Es Selamun Aleykum ve Rahmetullahi ve Berakatuh
Bismillah.

In today's article, insha'ALLAH, we will talk about useful, free, and great programs that you can use on your computers, each functional in its own way.
As you know, we live in the computer age. Today, many tasks from production to design, from writing to editing, are carried out in a computer environment. Naturally, most of us may have tasks that need to be performed on a computer, to a greater or lesser extent.
We use various programs to perform our tasks more easily on computers. However, unfortunately, not all of these programs may have the features we want. We may encounter many problems: some are very complex, some no longer work, and some—even though they are great—are paid.
For this reason, today we will provide you with program recommendations in many different fields, from video editing to image processing, from coding to application development, all of which can be used on computers and are free, insha'ALLAH.
So without further ado, let's move on to our list:

• Antivirus:
  • AVG: (Free / Paid Versions Available) AVG is an antivirus program that provides basic protection against viruses, malware, phishing, and other threats. While its free version offers basic protection features, advanced security features are available in paid versions. Overall, it is one of the most reliable antivirus programs; however, our humble recommendation is that rather than keeping antivirus programs installed continuously, you install them when you want to run a scan and then remove them afterward.
  • Norton Power Eraser (NPE): (Free) It is an aggressive scanning and cleanup tool that operates without requiring installation, specifically used to find and remove difficult-to-detect or suspicious malware. It should be used with caution as it carries a risk of false positive detections. It may also require an internet connection to function. Although the project has been currently discontinued, it remains a fast, powerful tool that requires no installation.
• Modeling & Design:
  • FreeCAD: (Open Source / Free) It is an open-source CAD program that can be used for parametric 3D CAD modeling, mechanical design, technical drawing, and engineering work. Although it is a highly functional and completely free program, it may be harder to use compared to its paid alternatives. However, it is continuously being developed and improved. We can say it is the best open-source CAD modeling software.
  • CADRays: (Open Source / Free) It is a program used to generate photo-realistic images (rendering) of CAD models in a computer environment. Since it is not known by most people, finding learning materials about it is difficult. Although it is not a very advanced program, having few settings makes it relatively easy and fast to learn and use.
  • Blender: (Open Source / Free) It is a professional open-source 3D and 2D content creation program used in many areas such as 3D modeling, animation, rendering, sculpting, simulation, compositing, and video editing. Although it is a somewhat complex program, it is an extremely powerful tool, and it is possible to find dozens of learning materials for it in many languages.
  • ArmorPaint: (Open Source / Paid Builds) It is an open-source 3D texture painting program used to paint PBR-based textures and materials directly onto 3D models. While its source code is published for free on GitHub, official desktop builds are provided as paid options. However, it is also possible to find free ready-made builds on the internet.
  • LibreCAD: (Open Source / Free) It is an open-source CAD program used for 2D technical drawing and computer-aided design. It can be especially used in architectural, mechanical, and technical drafting.
• 3D Printing:
  • UltiMaker Cura: (Open Source / Free) It is an open-source slicing program that converts 3D models like STL, 3MF, etc., into G-code files that 3D printers can read by dividing them into layers. Compared to its counterparts like PrusaSlicer, BambuSlicer, and OrcaSlicer, it has a more user-friendly and simpler interface.
  • BumpMesh: (Open Source / Free) It is a browser-based open-source project used to add surface relief, geometric details, and texture-like 3D surface effects to STL and similar 3D models. It is particularly useful for adding various textures to models you wish to 3D print.
• Graphics & Video:
  • OpenShot: (Open Source / Free) It is an open-source video editing program used for video cutting, merging, transitions, effects, audio editing, and basic video montage tasks. Among existing open-source or free video editors, it is the easiest to learn and use. It can render via CPU or GPU and is very lightweight.
  • Any Video Converter: (Free / Paid Versions Available) It is a very nice video conversion tool used to convert video and audio files to different formats, compress, edit, and perform various media operations. Although it has paid versions, the free version can meet all your needs.
  • GIMP: (Open Source / Free) It is a powerful open-source graphics editor used for photo editing, image processing, graphic design, digital painting, and various visual projects. Although not the absolute best in terms of ease of use, it is a very powerful tool. It stands out by being completely free and not requiring an account compared to other free alternatives. Plenty of learning materials can be found about it.
  • Krita: (Open Source / Free) It is an open-source professional graphics program developed for digital drawing, painting, illustration, concept art, and 2D artwork. While GIMP is preferred more for photo editing, Krita is more like a canvas in a virtual environment. It possesses extremely powerful tools for 2D drawing and painting.
  • Inkscape: (Open Source / Free) It is an open-source vector graphics editor used to create SVG-based vector drawings, logos, icons, diagrams, and graphic designs. It is a very powerful tool focusing on vector illustration.
  • Pencil2D: (Open Source / Free) It is an open-source animation program used to create 2D animations and drawings that emulate a traditional hand-drawn approach. It is simple and easy to use.
• Coding & Text:
  • Godot: (Open Source / Free) It is an open-source game engine used to develop 2D and 3D games as well as various applications. However, it is much more than just a game engine. With its powerful set of tools, it is also a very handy utility for developing desktop and mobile applications. It moves forward rapidly with a constantly evolving engine and growing community. Among current game engines, it is completely free and the most functional. It can also be used for non-game tasks.
  • Sublime Text: (Free to Use / Licensed) It is a fast and advanced text editor developed for coding and text editing. It can be downloaded and evaluated for free; a license must be purchased for continuous commercial/unrestricted use. It is not open source. However, since its evaluation period is unlimited, you can use it for free as long as you want. For this reason, it falls under the category of semi-paid/free-to-use. It is an extremely powerful and practical tool.
  • Notepad++: (Open Source / Free) It is an advanced open-source text editor developed for Windows aimed at editing code and plain text files.
  • XAMPP: (Free) It is a development package that brings together components like Apache web server, MariaDB, PHP, and Perl to easily transform your computer into a local web development server. It is easy to install and use. It is indispensable for PHP developers.
• Phone & Emulator:
  • LDPlayer: (Free) It is an Android emulator used to run Android applications and games (APK) on Windows. It is the most practical among existing emulators and is completely free.
  • 3uTools: (Free) It is a Windows tool used for file transfer, app management, backup, viewing device details, and various device management operations on iPhone and iPad devices. Being completely free and offering a wide array of built-in tools makes it ideal for communication between your mobile device and computer.
  • VirtualBox: (Open Source / Free) It is virtual machine software used to create virtual machines on operating systems like Windows, Linux, and macOS to run different operating systems simultaneously.
• PC Maintenance:
  • TreeSize Free: (Free / Paid Versions Available) It is a disk analysis tool that visually inspects storage usage by analyzing how much space files and folders occupy on hard drives and other storage devices. Thanks to this tool, you can see in detail how full your disk is and what causes it. The free version will meet all your needs.
  • DiskDigger: (Free / Paid Versions Available) It is a data recovery program aimed at recovering deleted files from hard drives, USB flash drives, memory cards, and similar storage media. While the free version limits you to recovering files one by one, it still retains full functionality.
  • IObit Uninstaller: (Free / Paid Versions Available) It is software that helps uninstall Windows programs and clean up remaining files, folders, and registry entries after uninstallation. It prevents applications you install and later wish to remove from leaving residue behind. It can be used for free.
  • CCleaner: (Free / Paid Versions Available) It is a utility program used to clean unnecessary files, manage applications, and perform various system maintenance tasks. It is especially functional for clearing junk files on the disk. It can be used for free.
  • Speccy: (Free / Paid Versions Available) It is a system information tool used to view hardware and system details such as CPU, RAM, motherboard, graphics card, storage drives, and operating system. It can be used for free.
  • Rufus: (Open Source / Free) It is an open-source tool used to create bootable USB flash drives from ISO and other disk images. With its lightweight structure and simple interface, it is a very practical tool.
  • balenaEtcher: (Open Source / Free) It is an open-source tool used to write disk images like ISO, IMG, etc., onto USB drives, SD cards, and other external storage devices. It can be used as an alternative to Rufus.
  • Raspberry Pi Imager: (Open Source / Free) It is the official Raspberry Pi tool that simplifies writing Raspberry Pi OS and other supported operating system images to SD cards or USB storage devices. However, its scope is not limited solely to Raspberry Pi. Just like Rufus and balenaEtcher, it is a simple and easy-to-use tool for writing image files.
• Font & Icon:
  • Birdfont: (Free) It is a font editor used to create and edit TTF, OTF, and SVG-based fonts. It is one of the easiest tools to learn and use for creating your own fonts.
  • Greenfish Icon Editor Pro: (Free) It is a free graphics editor for Windows used to create and edit icons, cursors, animated cursors, and icon libraries. It is highly functional.
  • RealWorld Cursor Editor: (Free) It is a free tool for Windows used to create mouse cursor files, edit them, and prepare animated cursors. It is perfect for creating personalized cursors.
• Archive:
  • WinRAR: (Free to Use / Paid) It is a file compression and archiving program used to create, extract, and manage RAR, ZIP, and various other archive formats. It might be the most famous archiving tool. It is very functional.
  • 7-Zip: (Open Source / Free) It is an open-source file compression program supporting the creation and extraction of 7z, ZIP, TAR, GZIP, and many different archive formats. It can be used to extract 7z files.
• Audio & Video Player:
  • Audacity: (Open Source / Free) It is an open-source audio editor used for audio recording, editing, cutting, applying effects, and exporting to various audio formats. It is completely free and a very powerful audio editing tool.
  • VLC: (Open Source / Free) It is an open-source media player supporting a wide array of audio and video formats as well as various media streams. It can run on almost any platform and supports almost every video type.
  • OBS Studio: (Open Source / Free) It is an open-source broadcasting and recording software used for screen recording, video recording, audio recording, live streaming, and scene-based production arrangements. It is one of the best free tools you can use to capture video by recording your screen.
• Office & General:
  • LibreOffice: (Open Source / Free) It is an open-source office suite offering various office applications together for text documents, spreadsheets, presentations, drawings, and databases. Unlike its paid counterparts, it is completely open source and free.
  • AnyDesk: (Free to Use / Paid for Commercial Use) It is remote desktop software used to connect to computers remotely, provide remote support, and manage computers from afar. It is a very easy-to-use, nice tool. It is used for a computer with AnyDesk installed to send a request to another computer with AnyDesk installed and manage it via remote connection. It is generally used for remote support, but many different usage scenarios exist.
• Useful Treasures:
  • Kur Yazılım Turkish-English Dictionary: (Free) It is a dictionary program that enables searching words in Turkish-English and English-Turkish, functions completely offline, and is entirely free. With its lightweight structure and easy usage, it allows you to translate words without needing online translation tools.
  • Resource Hacker: (Free) It is a Windows tool used to view, extract, edit, and modify resource sections of Windows EXE, DLL, and other PE files. It is especially useful for editing application icons and minor details.
  • Everything: (Free) It is a lightweight and fast search utility for Windows that indexes file names to locate files and folders extremely quickly. It is much faster and more functional than Windows' own search box.
  • Stacher: (Free) It is a media downloader tool with a graphical user interface that simplifies downloading video and audio from supported online sources. It is especially ideal for batch downloading videos or playlists from YouTube.
  • ActivityWatch: (Open Source / Free) It is open-source time tracking software that analyzes time usage by automatically tracking which applications and activities are used for how long on the computer. Especially if you spend a lot of time in digital environments, get easily distracted, or have trouble with self-control, it is a great tool for tracking how long you use each app.
  • Offline QR Code Generator (OQG): (Open Source / Free) It is an open-source QR code generation tool that can be used to create QR codes without requiring an internet connection.
  • dnSpyEx: (Open Source / Free) It is an open-source .NET inspection and reverse engineering tool used to examine .NET assembly files, decompile C# and Visual Basic code, debug, and analyze assembly content. It can also be used to inspect DLL files and includes an integrated Hex editor.
• Bonus: Mobile & Browser Extensions:
  • Instant WakeUp (iOS): (Free / Ad-supported) It is a program that allows you to set alarms on iOS devices. However, unlike standard alarms, it asks you to solve a puzzle in order to turn off the alarm. If you have trouble waking up in the morning or don't even remember turning off your alarm, this tool is ideal for ensuring you actually get up. It is especially recommended for those who struggle to wake up for Fajr (Morning) Prayer and Tahajjud Prayer. (For those having difficulty waking up for Tahajjud Prayer, we primarily recommend the method of drinking 3 glasses of water right before going to bed, before relying on an alarm.)
  • Web-to-APP (Android): (Open Source / Free) It is an open-source Android application designed to use or package websites into Android apps. It is simple to use and highly functional. You can turn your website into a mobile app within minutes without needing any coding knowledge.
  • İslamic Source (Android): (Free) It is a very lightweight application that allows you to access İslamic Source without opening your browser. It does not send notifications.
  • Unhook: (Free) It is a browser extension aimed at providing a cleaner YouTube experience by hiding distracting sections such as recommendations, Shorts, home feed, comments, and similar features. It is especially recommended if you spend a lot of time on social media and struggle with self-control. Even if you can control yourself, it is good for preventing distractions.
  • StayFocusd: (Free) It is a browser extension that helps reduce distraction and time loss by limiting the time spent on specific websites. It collects information such as how long you stay on which site and how many times you enter. Thus, you can monitor and audit the time you spend on the internet. Furthermore, you can block any sites you wish.
  • YouShield: (Free) Like Unhook, it is an extension aimed at blocking distractions on YouTube. Although less advanced than Unhook, it can be preferred for its simpler structure and easy usage.
• Bonus: Useful Websites:
  • Quran.com: (Free) A very beautiful website where you can read the Holy Quran, check translations and commentaries (tafsir) of verses, and select any verse range in any surah. May ALLAH be pleased with those who prepared it. Amin.
  • Sunnah.com: (Free) A great site where you can access primary authentic hadith sources such as Bukhari, Muslim, and Tirmidhi alongside their Arabic texts. May ALLAH be pleased with those who prepared it. Amin.
  • Yt1d.net: (Free) It is one of the simplest and fastest websites you can use to download videos from YouTube. It stands out by offering resolution options and downloading as MP4.
  • Thingiverse: (Free) It is a well-established site where you can find a wide variety of models, especially for 3D printing. Although its interface is a bit dated, it still contains high-quality models.
  • Printables: (Free) Although it is a younger platform than Thingiverse, it has a fairly large user base. It can be preferred for up-to-date and quality models.
  • Grabcad: (Free) While Grabcad is a platform where 3D models are shared mostly focused on engineering, it has a 3D model library where you can find quality models in many fields ranging from 3D printing to space technology, interior design to personal projects.
  • Have I Been Pwned: (Free) Have I Been Pwned is a website you can use to scan websites where your email address is registered to find out if your email address and related information have ever been involved in a data breach.
  • İslamic Source: (Free) İslamic Source is the official website of İslamic Source, which was opened specifically to serve Muslims, aiming to provide useful and high-quality content and information for Muslims in many religious and worldly areas. All its services are always free.
  • CSS Gradient: (Free) It allows you to create CSS gradient backgrounds. It is a practical website especially for web developers.
  • Poly Haven: (Free / Paid) It is a website focusing especially on PBR materials. Very diverse and high-quality content ranging from materials to ambient HDRs can be found inside.
  • Boykotdedektifi: (Free) It is one of the indispensable websites for those who want to learn boycotted brands along with their reasons.
  • Base64 Image Encoder: (Free) It is a website that outputs your uploaded images as Base64 code. It is functional for web developers.
  • SVG Converter: (Free) It might be the best free website you can use to convert bitmap image files into vector images.
  • Img2Go: (Free) It might be the best free website you can use to cleanly enlarge the dimensions of your images.
  • Filamentcolors: (Free) It is a very nice website you can use to get detailed information about how the color of your desired filament looks before buying filament for your 3D printer.
  • Bilinçli Tüketim: (Free) It is a nice website for those who want to learn about boycott.
  • Vocali.se: (Free) It is a free website you can use to separate vocals and instruments in audio files.
  • Moises: (Free) It is a website you can use to separate vocals and instruments in audio files. You need to sign up to use it, but even with a free membership, you can separate up to 5 audio files per month.
  • HTML Online Viewer: (Free) It is a simple website you can use to see how your HTML code will render. It can be useful for web developers.
  • Phonesized: (Free) It is a very functional website for those who want to learn and compare dimensions of phones before buying one.

In this list, insha'ALLAH, you can find a program for almost every task you can think of on a computer. While some of the programs here are globally popular, the number of people who know others is limited. Insha'ALLAH, it has been a useful article. Although none of the programs here belong to us, insha'ALLAH we will also offer you useful software in the future.
(If there is a broken link in the list, please let us know.)

If we have been correct, it is only from ALLAH. If we have made mistakes, it is only from ourselves. Insha'ALLAH, it has been beneficial.
Wishing for it to lead to good deeds. We await your good prayers.
Selamun aleykum.