Launched in 2018 Actively developed & supported. Supports tkinter, Qt, WxPython, Remi (in browser). Create custom GUI Windows simply, trivially with a full set of widgets. Multi-Window applications are also simple. Python 2.7 & 3 Support. 325+ Demo programs & Cookbook for rapid start. Extensive documentation.  Examples using Machine Learning(GUI, OpenCV Integration,  Chatterbot), Desktop Widgets (Rainmeter-like), Matplotlib + Pyplot integration, add GUI to command line scripts, PDF & Image Viewer. For both beginning and advanced programmers. docs -  PySimpleGUI.org GitHub - PySimpleGUI.com. Create complex windows simply.