Apps with 'FOSS' feature

All apps in Apps with 'FOSS' feature category. Use the filters below to narrow down your search. 
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  1. Thunderbird icon
     2530 likes

    Cross-platform email client providing POP/IMAP support, robust filtering, multiple accounts, and chat. Extendable via add-ons with RSS/Atom, etc.

    Cost / License

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • BSD
    • AppImageHub
    • Snapcraft
    • Flathub
    • PortableApps.com
    • F-Droid
    • Haiku
    • Homebrew
    • Chocolatey
    Thunderbird screenshot 1
    Thunderbird screenshot 1
    Thunderbird screenshot 2
    +8
    Thunderbird screenshot 3
    86 alternatives
    4.0
    Very Good106 reviews
  2. qBittorrent icon
     1774 likes

    The qBittorrent project aims to provide an open-source software alternative to µTorrent. Additionally, qBittorrent runs and provides the same features on all major platforms (FreeBSD, Linux, macOS, OS/2, Windows). qBittorrent is based on the Qt toolkit and libtorrent-rasterbar library.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • AppImageHub
    • Snapcraft
    • Flathub
    • PortableApps.com
    • Haiku
    • Cloudron
    qBittorrent screenshot 1
    qBittorrent screenshot 1
    qBittorrent screenshot 2
    +2
    qBittorrent screenshot 3
    75 alternatives
    4.4
    Very Good121 reviews
  3. Blender icon
     1747 likes

    Free open-source 3D software for modeling, texturing, rigging, animation, rendering, compositing, video editing, and simulation.

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Flathub
    • PortableApps.com
    • Haiku
    • Steam
    • Flatpak
    • Snapcraft
    Splash Artwork for Blender 4.3
    Cycles Render Engine
    Modeling, Sculpt, UV
    +9
    VFX
    140 alternatives
    4.8
    Excellent65 reviews
  4. Nextcloud icon
     1171 likes

    On-premises file sync, universal access, integrated collaboration, real-time communication with privacy and data control focus.

    Cost / License

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Snapcraft
    • F-Droid
    • Raspberry Pi
    • Cloudron
    • Docker Hub
    • HUAWEI AppGallery
    • Flathub
    Simple and powerful file sync & share
    Simple upload even for people who don’t have Nextcloud
    Great Android & iOS apps to sync your files.
    +3
    Very easy theming
    154 alternatives
    4.6
    Excellent87 reviews
  5. calibre icon
     1487 likes

    Free e-book manager offering library management, multi-format conversion, syncing to devices, news download as e-books, built-in viewer, editor, and privacy.

    Cost / License

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Self-Hosted
    • Flathub
    • PortableApps.com
    • Homebrew
    calibre screenshot 1
    calibre screenshot 1
    Calibre collection on the iPhone
    +4
    You can choose many languages
    111 alternatives
    4.2
    Very Good47 reviews
  6. F-Droid icon
     851 likes

    Discover and install FOSS Android apps with ease. Privacy-focused, ad-free, and no registration required, F-Droid offers a lightweight alternative.

    Cost / License

    Platforms

    • Online
    • Android
    • Android Tablet
    • F-Droid
    F-Droid screenshot 1
    F-Droid screenshot 2
    F-Droid screenshot 3
    76 alternatives
    4.6
    Excellent63 reviews
  7. Element icon
     770 likes

    A secure collaboration app with end-to-end encryption and interoperability across web, desktop, and mobile. Includes chat, voice, and video calls.

    Cost / License

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Matrix.org
    • Flathub
    • F-Droid
    • Cloudron
    • Snapcraft
    Video calls for desktop and mobile
    Collaboration widgets
    Collaboration and screen sharing
    +1
    Connect with other apps
    302 alternatives
    4.4
    Very Good55 reviews
  8. A versatile open-source word processor with robust formatting, style options, and cross-platform availability, ideal for both memos and complex book publishing.

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Flathub
    • PortableApps.com
    • ReactOS
    LibreOffice - Writer screenshot 1
    LibreOffice - Writer screenshot 1
    LibreOffice 6.1 on Windows 10 (without toolbars)
    +2
    LibreOffice - Writer screenshot 3
    86 alternatives
    4.5
    Excellent43 reviews
  9. ONLYOFFICE icon
     639 likes

    Open-source suite for editing documents, spreadsheets, presentations, forms, and PDF files with co-editing modes, plugin support, AI assistant, and integration across 40+ platforms.

    Cost / License

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • HUAWEI AppGallery
    • iPad
    • Self-Hosted
    • AppImageHub
    • Snapcraft
    • Flathub
    • Samsung Galaxy Store
    • Software as a Service (SaaS)
    • Flatpak
    • Cloudron
    ONLYOFFICE screenshot 1
    ONLYOFFICE screenshot 1
    ONLYOFFICE screenshot 2
    +7
    ONLYOFFICE screenshot 3
    71 alternatives
    4.1
    Very Good64 reviews
  10. RustDesk icon
     276 likes

    Open source tool for secure remote access and screen sharing, supporting cross-platform use and self-hosting for complete data control.

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Flathub
    • F-Droid
    • Flatpak
    RustDesk screenshot 1
    Main window
    RustDesk screenshot 2
    +2
    File transfer window
    130 alternatives
    4.4
    Very Good34 reviews
  11. Aurora Store icon
     321 likes

    Aurora Store enables you to search and download apps from the official Google Play store. You can check app descriptions, screenshots, updates, reviews, and download the APK directly from Google Play to your device.

    Cost / License

    Platforms

    • Android
    • Android Tablet
    • F-Droid
    • HUAWEI AppGallery
    Aurora Store screenshot 1
    Aurora Store screenshot 2
    Aurora Store screenshot 3
    74 alternatives
    4.7
    Excellent38 reviews
  12. Fedora icon
     592 likes

    Fedora creates an innovative, free, and open source platform for hardware, clouds, and containers that enables software developers and community members to build tailored solutions for their users.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Linux
    Fedora 38
    Fedora screenshot 1
    Fedora screenshot 2
    +9
    XFCE spin
    183 alternatives
    4.6
    Excellent44 reviews
  13. Arch Linux icon
     781 likes

    Arch Linux is an independently developed, x86_64 optimized GNU/Linux distribution targeted at competent Linux users. It uses pacman, its home-grown package manager, to provide updates to the latest software applications with full dependency tracking.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Linux
    arch with KDE 4.4 desktop
    another arch with KDE 4.3 desktop
    arch for console addict
    +1
    arch with openbox window manager
    199 alternatives
    4.6
    Excellent31 reviews
  14. Godot Engine icon
     588 likes

    Godot Engine is a feature-packed, cross-platform game engine to create 2D and 3D games from a unified interface. It provides a comprehensive set of common tools, so that users can focus on making games without having to reinvent the wheel.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • Epic Games Store
    • Flathub
    • F-Droid
    • Haiku
    • Steam
    • FreeBSD
    • Flatpak
    • itch.io
    • Meta Quest
    Godot Engine screenshot 1
    Fully-dedicated 2D engine
    XR (VR and AR) support
    +6
    Gorgeous 3D graphics
    178 alternatives
    4.5
    Excellent54 reviews
  15. MPV icon
     550 likes

    MPV is an audio and movie player based on MPlayer and mplayer2. It supports a wide variety of video file formats, audio and video codecs, and subtitle types.

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • BSD
    • F-Droid
    • Haiku
    • Xfce
    • Chocolatey
    • Flathub
    • Snapcraft
    MPV screenshot 1
    MPV screenshot 1
    MPV screenshot 2
    113 alternatives
    4.4
    Very Good51 reviews
  16. Jellyfin icon
     328 likes

    Free open-source media system alternative to proprietary options, supports Chromecast, 4K streaming, plugin extensions, with privacy focus.

    Cost / License

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Flathub
    • Tizen OS
    • F-Droid
    • Android TV
    • Kodi
    • Docker
    • Fire TV
    • Roku
    • Cloudron
    Jellyfin screenshot 1
    Jellyfin screenshot 1
    Jellyfin screenshot 2
    +1
    Jellyfin screenshot 3
    51 alternatives
    4.7
    Excellent28 reviews
  17. FreeTube icon
     266 likes

    Experience YouTube ad-free on desktop with enhanced privacy. FreeTube prevents Google tracking and works seamlessly across Windows, Mac, and Linux.

    Cost / License

    Platforms

    • Mac
    • Windows
    • Linux
    • AppImageHub
    • Flathub
    • Flatpak
    Subscriptions showcase
    Video player
    Settings
    +4
    FreeTube screenshot 3
    81 alternatives
    4.6
    Excellent42 reviews
  18. Free multi-platform software for task management, time tracking, and personal project management. Seamless integration with Jira, GitHub, and GitLab.

    Cost / License

    • Free
    • Open Source (MIT)

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • Android Tablet
    • Snapcraft
    • Flathub
    • F-Droid
    • Flatpak
    Task List and Calendar Panel side by side
    The task list view
    Scheduel Page with some tasks
    +3
    Customizable boards (Kanban, Eisenhower Matrix, etc.)
    214 alternatives
    4.8
    Excellent41 reviews
  19. GrapheneOS icon
     151 likes

    GrapheneOS is a privacy and security focused mobile OS with Android app compatibility developed as a non-profit open source project. It's focused on the research and development of privacy and security technology including substantial improvements to sandboxing, exploit...

    Cost / License

    • Free
    • Open Source (MIT)

    Application types

    Platforms

    • Android
    • Android Tablet
    GrapheneOS screenshot 1
    GrapheneOS screenshot 1
    GrapheneOS screenshot 2
    31 alternatives
    4.6
    Excellent25 reviews
  20. Obtainium icon
     116 likes

    Obtainium allows you to install and update Open-Source Apps directly from their releases pages, and receive notifications when new releases are made available.

    Cost / License

    Platforms

    • Android
    • Android Tablet
    • F-Droid
    Obtainium screenshot 1
    Obtainium screenshot 2
    Obtainium screenshot 3
    56 alternatives
    4.9
    Excellent18 reviews
  21. RetroArch icon
     319 likes

    A portable, fast, and lightweight emulator frontend supporting classic and modern gaming systems with features like real-time rewinding and shader support.

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Blackberry
    • iPad
    • F-Droid
    • Steam
    • Raspberry Pi
    • Playstation
    • Xbox
    Main view
    Online updater
    Screen keyboard
    +6
    Playlist
    4.0
    Very Good14 reviews
  22. addy.io icon
     139 likes

    Open-source service offering unlimited anonymous email aliases, encrypted forwarding, spam protection, and anonymous replies to keep your identity private.

    Cost / License

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Microsoft Edge
    • Google Chrome
    • Safari
    • F-Droid
    • Software as a Service (SaaS)
    • Mozilla Firefox
    Manage aliases from the dashboard
    The main interface for the Firefox extension
    Settings for the extension
    +1
    Generate Random Chars alias using the extension.
    110 alternatives
    4.7
    Excellent16 reviews
  23. FLAC icon
     634 likes

    FLAC stands for Free Lossless Audio Codec, an audio format similar to MP3, but lossless, meaning that audio is compressed in FLAC without any loss in quality. This is similar to how Zip works, except with FLAC you will get much better compression because it is designed...

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • BSD
    • Haiku
    7 alternatives
  24. Playnite icon
     232 likes

    Video game library manager and launcher with support for 3rd party libraries like Steam, GOG, Origin and Uplay, providing one unified interface for your games.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Windows
    Playnite screenshot 1
    Playnite screenshot 1
    Playnite screenshot 2
    +1
    Playnite screenshot 3
    45 alternatives
    4.7
    Excellent20 reviews