C++ Qt

Open-source C++ projects categorized as Qt
Qt5 CPP Linux Windows C++

Top 23 C++ Qt Projects

  1. flameshot

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

    Project mention: Flameshot – Powerful, yet simple to use open-source screenshot software | news.ycombinator.com | 2024-06-11
  2. InfluxDB

    InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.

    InfluxDB logo
  3. QtScrcpy

    Android real-time display control software

  4. MuseScore

    MuseScore is an open source and free music notation software. For support, contribution, bug reports, visit MuseScore.org. Fork and make pull requests!

    Project mention: How to prompt LLM to infer XSD from many XML documents? | news.ycombinator.com | 2024-12-05

    In case anyone is interested in the details, I am trying to infer the MuseScore MSCX format to ensure that my MusicXML => MuseScore generator at https://github.com/infojunkie/musicxml-mscx produces valid scores. I want to use all the supplied MSCX files in the repo https://github.com/musescore/MuseScore for inference.

  5. moonlight-qt

    GameStream client for PCs (Windows, Mac, Linux, and Steam Link)

    Project mention: Show HN: Open-source GeForce NOW alternative with Stadia's social features | news.ycombinator.com | 2024-05-18

    > I’m sure there’s a way to transmit those frames over a network if one was clever enough

    Something like Sunshine[1], coupled with Moonlight[2]?

    [1] https://github.com/LizardByte/Sunshine

    [2] https://github.com/moonlight-stream/moonlight-qt

  6. zeal

    Offline documentation browser inspired by Dash

    Project mention: Man pages are great, man readers are the problem | news.ycombinator.com | 2025-04-09
  7. tiled

    Flexible level editor

    Project mention: Building Game Prototypes with LÖVE | news.ycombinator.com | 2024-12-31

    I built Twins of Caduceus (a snake-based game where you have to control two snakes simultaneously) entirely using Phaser 3. I've had mostly very good experiences with it as a batteries included framework (renderer, asset management, physics, input, etc.)

    It's a shame that the map/level editor is a eternal subscription fee with no fallback license. That means you're relegated to either building your own map editor or using something like Tiled.

    https://specularrealms.itch.io/the-twins-of-caduceus

    https://www.mapeditor.org/

  8. FileCentipede

    Cross-platform internet upload/download manager for HTTP(S), FTP(S), SSH, magnet-link, BitTorrent, m3u8, ed2k, and online videos. WebDAV client, FTP client, SSH client.

  9. SaaSHub

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

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  10. NotepadNext

    A cross-platform, reimplementation of Notepad++

    Project mention: Notepad++ is 21 years old | news.ycombinator.com | 2024-11-01
  11. nodegui

    A library for building cross-platform native desktop applications with Node.js and CSS 🚀. React NodeGui : https://react.nodegui.org and Vue NodeGui: https://vue.nodegui.org

  12. olive

    Free open-source non-linear video editor

  13. LiteIDE

    LiteIDE is a simple, open source, cross-platform Go IDE.

  14. albert

    A fast and flexible keyboard launcher

    Project mention: Wayland Application Launchers: Stick with Rofi | dev.to | 2025-05-11

    albert: Powerful, but a bit involved. I am looking for something simpler.

  15. PrismLauncher

    A custom launcher for Minecraft that allows you to easily manage multiple installations of Minecraft at once (Fork of MultiMC)

  16. Serial-Studio

    The universal dashboard for embedded systems.

  17. mixxx

    Mixxx is Free DJ software that gives you everything you need to perform live mixes.

    Project mention: The Art of DJing: Avalon Emerson | news.ycombinator.com | 2025-03-28

    > I don't have a physical controller

    There are a lot of really cheap USB based controllers - I've got an old USB 1.1 based controllers for 35€ and it's working perfectly fine - it's only midi - you can dump the hex values using midi tools in Linux when you turn the nobs. Mixxx has a really long list of supported devices: https://github.com/mixxxdj/mixxx/wiki/Hardware-Compatibility

    You need another soundcard for headphones, there also exist lots of cheap old USB soundcards for that.

    Then it's up to you to practice. I'm also struggling to get better but it's really all you need to DJ.

  18. QOwnNotes

    QOwnNotes is a plain-text file notepad and todo-list manager with Markdown support and Nextcloud / ownCloud integration.

    Project mention: Ask HN: What note taking app do you guys using as a developer? | news.ycombinator.com | 2025-03-08
  19. LibreCAD

    LibreCAD is a cross-platform 2D CAD program written in C++17. It can read DXF/DWG files and can write DXF/PDF/SVG files. It supports point/line/circle/ellipse/parabola/spline primitives. The user interface is highly customizable, and has dozens of translations.

    Project mention: LibreCAD Font File | news.ycombinator.com | 2024-09-06
  20. Librum

    The Librum client application

  21. hotspot

    The Linux perf GUI for performance analysis.

    Project mention: Ask HN: What's the Best Open Source Tool You've Discovered Recently? | news.ycombinator.com | 2025-04-11
  22. notes

    Fast and beautiful note-taking app written in C++. Write down your thoughts.

    Project mention: App Should Have Been a Website (and Probably Your Game Too) | news.ycombinator.com | 2024-12-31

    Hi there! Yes, I will switch to a more distinctive icon in the future once I can afford to hire a new designer.

    Multiplayer was quoting the correct reason. I also exeplained more about the timeline here: https://github.com/nuttyartist/notes/issues/690#issuecomment...

    Tldr: The FOSS version earned a stable revenue through Google Ads placed on the website, since the website ranked high on Google searches. Two years ago, that changed since the website got de-ranked, so I created a different, proprietary version of the app based on the FOSS version but with a totally revamped block editor that I wrote from scratch - that I worked on full-time for a whole 1 year.

  23. Clementine

    :tangerine: Clementine Music Player

    Project mention: DeaDBeeF: The Ultimate Music Player | news.ycombinator.com | 2025-02-12
  24. FluentUI

    FluentUI for QML (by zhuzichu520)

  25. qgroundcontrol

    Cross-platform ground control station for drones (Android, iOS, Mac OS, Linux, Windows)

  26. SaaSHub

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

    SaaSHub logo
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 Qt projects in C++? This list will help you:

# Project Stars
1 flameshot 26,157
2 QtScrcpy 24,059
3 MuseScore 13,120
4 moonlight-qt 13,023
5 zeal 12,125
6 tiled 11,704
7 FileCentipede 10,360
8 NotepadNext 10,008
9 nodegui 9,053
10 olive 8,532
11 LiteIDE 7,683
12 albert 7,502
13 PrismLauncher 6,848
14 Serial-Studio 5,444
15 mixxx 5,386
16 QOwnNotes 5,003
17 LibreCAD 4,921
18 Librum 4,496
19 hotspot 4,373
20 notes 4,001
21 Clementine 3,941
22 FluentUI 3,940
23 qgroundcontrol 3,681

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