Slint is an open-source declarative GUI toolkit
Windows GUI Automation with Python (based on text properties)
A simple and easy-to-use immediate-mode gui library
Thunder Client is a lightweight Rest API Client Extension for VS Code
The Graphical Interface for your package managers
GPU-accelerated GUI development for Node.js and the browser
A GUI tool for extracting hard-coded subtitle (hardsub) from videos
Now continued as OculiX — see oculix.org
Lightning-fast and Powerful Code Editor written in Rust
Windows inside a Docker container
SoapUI is a free and open source cross-platform functional testing
Kafka GUI for Apache Kafka to manage topics, topics data, etc.
Standalone Git GUI based on EGit
Java library for creating and manipulating vector geometry.
Powerful utility for keyboard customization
Evolutionary multi-objective optimization platform
Reko is a binary decompiler
wxPython's Project Phoenix. A new implementation of wxPython
Enabling Windows Subsystem for Linux to include support for Wayland
Simple and flexible programming language for applications development
A professional cross-platform SSH/Sftp/Shell/Telnet/Serial terminal
A Simple cross-platform library for communicating with HID devices
A reverse engineering suite (decompiler, editor, debugger and more)
A Python library for making simple Electron-like HTML/JS GUI apps
The scientific Python development environment