Kivy!

PyQt is a set of Python bindings for Nokia's Qt application framework and runs on all platforms supported by Qt including Windows, MacOS/X and Linux. There are two sets of bindings: PyQt v4 supports Qt v4; and the older PyQt v3 supports Qt v3 and earlier. The bindings are implemented as a set of Python modules and contain over 300 classes and over 6,000 functions and methods.

LambdaNative is developed and maintained by the Pediatric Anesthesia Research Team (PART) and the Electrical and Computer Engineering in Medicine (ECEM) group at the University of British Columbia (UBC).

Pydroid 3 is the most easy to use and powerful educational Python 3 IDE for Android.