Qt

Open-source projects categorized as Qt
Qt5 CPP Linux Python GUI

Top 23 Qt Open-Source Projects

  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

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  3. QtScrcpy

    Android real-time display control software

  4. cool-retro-term

    A good looking terminal emulator which mimics the old cathode display...

    Project mention: Hackers (1995) Animated Experience | news.ycombinator.com | 2026-02-06

    Not exactly, there is cool retro term: https://github.com/Swordfish90/cool-retro-term

  5. matplotlib

    matplotlib: plotting with Python

    Project mention: An AI Agent Published a Hit Piece on Me – More Things Have Happened | news.ycombinator.com | 2026-02-13

    Another fascinating thing that the Reddit thread discussing the original PR pointed out is that whoever owns that AI account opened another PR (same commits) and later posted this comment: https://github.com/matplotlib/matplotlib/pull/31138#issuecom...

    > Original PR from #31132 but now with 100% more meat. Do you need me to upload a birth certificate to prove that I'm human?

    It’s a bit wild to me that people are siding with the AI agent / whoever is commanding it. Combined with the LLM hallucinated reporting and all the discussion this has spawned, I think this is making out to be a great case study on the social impact of LLM tooling.

  6. moonlight-qt

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

  7. 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: Cough sound artifact on Musesounds Alto Sax Staccato concert E4 note | news.ycombinator.com | 2025-09-17
  8. openage

    Clone of the Age of Empires II engine πŸš€

  9. NotepadNext

    A cross-platform, reimplementation of Notepad++

    Project mention: Notepad++ for Mac | news.ycombinator.com | 2026-04-26

    My "Notepad++ for Mac" so far has been NotepadNext (https://github.com/dail8859/NotepadNext). I will give this one a try as well, and wish them best of luck. I hope they release the Linux version as well.

  10. PySimpleGUI

    Python GUIs for Humans! PySimpleGUI is the top-rated Python application development environment. Launched in 2018. NEW for 2026 - the LGPL3 Version 6. Transforms tkinter, Qt, WxPython, and Remi into a simple, intuitive, and fun experience for both hobbyists and expert users.

    Project mention: PySimpleGUI 6 | news.ycombinator.com | 2026-05-05
  11. zeal

    Offline documentation browser inspired by Dash

    Project mention: Focused Work, Distraction-Free Coding | dev.to | 2026-05-24

    Zeal (open source, free) is a free/libre/open source docset viewer that runs on Windows, Linux, and BSD. While it is possible to build Zeal for MacOS, the recommendation is to download Dash.

  12. tiled

    Flexible level editor

    Project mention: Tiled – Flexible Level Editor | news.ycombinator.com | 2026-03-08
  13. qutebrowser

    A keyboard-driven, vim-like browser based on Python and Qt.

  14. 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.

  15. qt

    Qt binding for Go (Golang) with support for Windows / macOS / Linux / FreeBSD / Android / iOS / Sailfish OS / Raspberry Pi / AsteroidOS / Ubuntu Touch / JavaScript / WebAssembly

  16. easyeffects

    Limiter, compressor, convolver, equalizer and auto volume and many other plugins for PipeWire applications

    Project mention: CachyOS: Fast and Customizable Linux Distribution | news.ycombinator.com | 2025-11-30
  17. PrismLauncher

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

  18. Spyder

    Official repository for Spyder - The Scientific Python Development Environment

  19. nodegui

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

  20. olive

    Free open-source non-linear video editor

  21. albert

    A fast and flexible keyboard launcher

    Project mention: Show HN: A Raycast-compatible launcher for Linux | news.ycombinator.com | 2025-07-13
  22. PyQt-Fluent-Widgets

    A fluent design widgets library based on C++ Qt/PyQt/PySide. Make Qt Great Again.

  23. vicinae

    A focused launcher for your desktop - native, fast, extensible

    Project mention: Glaze by Raycast | news.ycombinator.com | 2026-03-04

    so many unknowns...

    1. macOS and Windows require installation of Xcode and Visual Studio respectively, and if in Apple's case you kinda can install these tools headlessly and choose to install only the "build tools" package, Microsoft's creature is gonna daze and confuse you with a crap-ton of checkboxes and no easy "just install whatever is minimally needed to compile my code" button, and I don't recall if there is way to install build tools on Windows through terminal.

    2. what is going to be distributed? source code itself or actual binaries? and what will the security model of Glaze store be? same as extensions, "everything is open-source and undergoes Raycast's and community review"?

    3. Glaze is going to come to Windows and Linux, if we trust the Q&A section at the end. what will Glaze build upon? separate frameworks and languages for each platform or something multi-platform [1] like Tauri or Kotlin Multiplatform? or are you going to copy the Raycast extension model - just run Node, expose some platform integration, and parse React render trees through "Glaze Runtime"? I've been working on a bug in Vicinae [2][3], and I've seen this model in action. it's very hard to make it perform well, but all it takes to achieve native look and feel is to just map React render trees to whatever system component OS offers. (in Vicinae's case, it's Qt. bet that it's done with SwiftUI on macOS and WinUI 3 on Windows.)

    [1]: there is a difference between "cross-platform" and "multi-platform". "cross-platform" means "I behave equally across platforms and have no awareness of native look and feel" (e.g. Electron, Unity, Flutter), while "multi-platform" means "I can adapt across platforms to the degree you need" (e.g. C/C++, Rust, KMP)

    [2]: https://github.com/vicinaehq/vicinae

    [3]: https://github.com/vicinaehq/vicinae/pull/1158

  24. LiteIDE

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

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? This list will help you:

# Project Stars
1 flameshot 30,075
2 QtScrcpy 29,712
3 cool-retro-term 25,623
4 matplotlib 22,867
5 moonlight-qt 17,435
6 MuseScore 14,675
7 openage 14,239
8 NotepadNext 14,211
9 PySimpleGUI 13,799
10 zeal 12,653
11 tiled 12,626
12 qutebrowser 11,535
13 FileCentipede 10,875
14 qt 10,790
15 easyeffects 9,580
16 PrismLauncher 9,538
17 Spyder 9,231
18 nodegui 9,220
19 olive 9,040
20 albert 7,936
21 PyQt-Fluent-Widgets 7,936
22 vicinae 7,935
23 LiteIDE 7,756

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