C++ free-software

Open-source C++ projects categorized as free-software

Top 5 C++ free-software Projects

free-software
  1. flameshot

    Powerful yet simple to use screenshot software :desktop_computer: :camera_flash:

    Project mention: Flameshot | news.ycombinator.com | 2026-01-29

    I used to really like this software, and I still do. But there were a couple of dealbreakers for me.

    1) As others mentioned, Wayland support. But it seems that it's gotten a lot better since I last used it. I resisted using Wayland for a long time because of several software breaking, but I've switched over now that most of the things I use now work (or because I've stopped using things that don't work).

    2) it was broken for me with fractional scaling. This is the main reason why I switched, I started using fractional scaling on my second monitor and could not properly fix it for the life of me. I haven't tested it recently, but I just checked, and the github issue seems to still be open. https://github.com/flameshot-org/flameshot/issues/564

  2. SaaSHub

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

    SaaSHub logo
  3. Celestia

    Real-time 3D visualization of space.

    Project mention: Celestia – real-time 3D visualization of space | news.ycombinator.com | 2025-09-14

    HoverZoom: Chrome plugin sold by original dev, new update included spyware and ads.

    As I said, I don't mind if the answer is "we are volunteers who love this", but I do ask that formal webpages presenting a product explains it's funding model. Their github (https://github.com/CelestiaProject/Celestia) is much better at this.

  4. Soundux

    🔊 A cross-platform soundboard

  5. Hypersomnia

    Multiplayer top-down shooter made from scratch in C++. Web version: https://play.hypersomnia.io Made in 🇵🇱

  6. megaglest-source

    MegaGlest real-time strategy game engine (cross-platform, 3-d)

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).

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Index

What are some of the best open-source free-software projects in C++? This list will help you:

# Project Stars
1 flameshot 30,075
2 Celestia 2,297
3 Soundux 1,988
4 Hypersomnia 1,564
5 megaglest-source 402

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