Dear ImGui: Bloat-free Immediate Mode Graphical User interface for C++ with minimal dependencies

A Fast, Extensible Progress Bar for Python and CLI

Free universal database tool and SQL client

A single-header ANSI C gui library

Rust / Wasm framework for building client web apps

💿 Free software that works great, and also happens to be open-source Python.

Oni: Modern Modal Editing - powered by Neovim

Cross platform GUI in Go based on Material Design

💻 Medis is a beautiful, easy-to-use Mac database management application for Redis.

Avalonia is a cross-platform XAML-based UI framework providing a flexible styling system and supporting a wide range of Operating Systems such as Windows via .NET Framework and .NET Core, Linux via Xorg, macOS

Browser-based frontend to gdb (gnu debugger). Add breakpoints, view the stack, visualize data structures, and more in C, C++, Go, Rust, and Fortran. Run gdbgui from the terminal and a new tab will open in your browser.

Free and Open Source Reverse Engineering Platform powered by radare2

📂 Web File Browser which can be used as a middleware or standalone app.

GUI image optimizer for Mac

AriaNg, a modern web frontend making aria2 easier to use.

A cross-platform GUI library for Rust, inspired by Elm

Minimalist Go package aimed at creating Console User Interfaces.

Powerful yet simple to use screenshot software

Script to remove Windows 10 bloatware.

A library for building cross-platform native desktop applications with Node.js and CSS 🚀. For React NodeGui, visit: https://github.com/nodegui/react-nodegui ⚛️

Build performant, native and cross-platform desktop applications with native React + powerful CSS like styling.🚀

A cross platform front-end GUI of the popular youtube-dl written in wxPython.

A Windows GUI toolkit for the Go Programming Language

✔️The smallest header-only GUI library(5 KLOC) for all platforms

Red is a next-generation programming language strongly inspired by Rebol, but with a broader field of usage thanks to its native-code compiler, from system programming to high-level scripting and cross-platform reactive GUI, while providing modern support for concurrency, all in a zero-install, zero-config, single 1MB file!

Persepolis Download Manager is a GUI for aria2.

Launched in 2018 Actively developed and supported. Supports tkinter, Qt, WxPython, Remi (in browser). Create custom layout GUI's simply. Python 2.7 & 3 Support. 200+ Demo programs & Cookbook for rapid start. Extensive documentation. Examples using Machine Learning(GUI, OpenCV Integration, Chatterbot), Floating Desktop Widgets, Matplotlib + Pyplot integration, add GUI to command line scripts, PDF & Image Viewer. For both beginning and advanced programmers .

Desktop GUI Framework

Powerful and easy-to-use embedded GUI with many widgets, advanced visual effects (opacity, antialiasing, animations) and low memory requirements (16K RAM, 64K Flash).

Native Mac app that shows all open files, directories, sockets, pipes and devices in use by all running processes. Nice GUI for lsof.