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Browse 122,510 All Software on AlternativeTo with popular options like Free and Open Source.

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  1. DAEMON Tools icon
     988 likes

    Disc imaging and mounting software with support for VHD, ZIP, and remote access. Offers encryption and iSCSI imaging with Windows integration.

    DAEMON Tools screenshot 1
    45 alternatives
    2.9
    Poor18 reviews
  2. Portal icon
     445 likes

    Portal™ is a puzzle game from Valve. Set in the mysterious Aperture Science Laboratories, Portal has been called one of the most innovative games on the horizon and will offer gamers hours of unique gameplay.

    • Puzzle Game
    • PaidProprietary
    • Mac
    • Windows
    • Linux
    • Steam
    • Playstation
    • Xbox
    Banner
    19 alternatives
  3. Excalidraw icon
     94 likes

    Excalidraw is an open-source whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them. Available directly online as a web app and also through CodeSandbox to easily see how the code works, and the app is available for self-hosting.

    Excalidraw screenshot 1
    78 alternatives
  4. FreshRSS icon
     175 likes

    FreshRSS is a free, self-hosted RSS aggregator. It is quite lightweight, fast (it can manage +100k articles without complaining) and powerful (e.g. shortcuts, filters, responsive design, multi-views, multi-themes, multi-users, statistics, provides a Google Reader API, etc.)

    Configuration page
    124 alternatives
    4.7
    Excellent14 reviews
  5. Node.js icon
     324 likes

    Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications.

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Chrome OS
    • BSD
    • Self-Hosted
    Node.js screenshot 1
    25 alternatives
  6. C is a general-purpose programming language. It was created in the 1970s by Dennis Ritchie and remains very widely used and influential. By design, C's features cleanly reflect the capabilities of the targeted CPUs.

    C (programming language) screenshot 1
    61 alternatives
  7. ClamAV icon
     248 likes

    Clam AntiVirus is an open source (GPL) anti-virus toolkit for UNIX, designed especially for e-mail scanning on mail gateways. It provides a number of utilities including a flexible and scalable multi-threaded daemon, a command line scanner and advanced tool for automatic...

    ClamAV GUI
    3.4
    Fair12 reviews
  8. ShutUp10++ icon
     149 likes

    O&O ShutUp10++ means you have full control over which comfort functions under Windows 10 and Windows 11 you wish to use, and you decide when the passing on of your data goes too far. Using a very simple interface, you decide how Windows 10 and Windows 11 should respect your...

    ShutUp10++ screenshot 1
    4.1
    Very Good17 reviews
  9. OpenSSH icon
     384 likes

    OpenSSH is a free version of the SSH connectivity tools that technical users rely on. OpenSSH encrypts all traffic (including passwords) to effectively eliminate eavesdropping, connection hijacking, and other attacks.

    • SSH Client
    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • iPhone
    • BSD
    • Cygwin
    • Haiku
    60 alternatives
  10. REAPER icon
     252 likes

    A digital audio workstation, MIDI sequencer and video editing software application created by Cockos. The current version is available for Microsoft Windows, macOS, and Linux.

    Default theme
    83 alternatives
    4.8
    Excellent12 reviews
  11. 0 A.D. icon
     249 likes

    0 A.D. is a free, open-source, cross-platform real-time strategy (RTS) game of ancient warfare. In short, it is a historically-based war/economy game that allows players to relive or rewrite the history of Western civilizations, focusing on the years between 500 B.C. and 500 A.D.

    • RTS Game
    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • BSD
    • Snapcraft
    • Flathub
    0 A.D. screenshot 1
    44 alternatives
    4.6
    Excellent17 reviews
  12. Wire icon
     311 likes

    Wire is the most secure collaboration platform featuring messenger, voice, video, conference calls, file-sharing, and external collaboration –all protected by the most secure end-to-end-encryption.

    • Instant Messenger
    • Free PersonalOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • F-Droid
    • Software as a Service (SaaS)
    • Flathub
    • Snapcraft
    Wire screenshot 1
    Wire screenshot 2
    Wire screenshot 3
    282 alternatives
    4.1
    Very Good21 reviews
  13. File Converter icon
     152 likes

    File Converter is a very simple tool which allows you to convert and compress one or several file(s) using the context menu in Windows Explorer.

    File Converter screenshot 1
    275 alternatives
    4.7
    Excellent22 reviews
  14. SpeedCrunch icon
     291 likes

    SpeedCrunch is a free, fast, high precision open source algebraic calculator with an intuitive interface and many features, such as variables, syntax highlighting, functions, persistent input history & more.

    • Discontinued
    • Calculator
    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • PortableApps.com
    Dark Mode
    130 alternatives
    4.2
    Very Good18 reviews
  15. dupeGuru icon
     205 likes

    dupeGuru is a free and open source tool to find duplicate files on your computer. It can scan either filenames or contents. The filename scan features a fuzzy matching algorithm that can find duplicate filenames even when they are not exactly the same.

    dupeGuru screenshot 1
    3.9
    Good21 reviews