PyQt - Riverbank | Software | PyQt | What is PyQt?
WompMobile - WompMobile offers tow kind of functions – first creating new mobile apps and secondly converting the websites into mobile applications.
PySimpleGUI - A simple to use GUI that can create custom GUIs
AppGyver Composer - Visual enterprise-grade low code mobile app builder
MD Python Designer - A drag and drop GUI Designer that uses a combination of Tkinter and its own code.
Mendix - Mendix is the fastest and easiest low-code platform used by businesses to create and continuously improve mobile and web apps at scale.