Basicbuilder is a program for the ti83+/84+ calculators. It can package basic programs as apps, from which they can be directly executed.
A microkernel operating system distribution offering (among other things) very low hardware requirements, full and easy portability and easy-readable source code.
Gumby is a Visual RAD for building Python GUI programas either with PyQT, PyGTK and wxPython/wxWidgets. The idea is to extend the existing Python IDEs into a complete Python RAD with visual capabilities and GUI constructors rivaling VB and Delphi/Kylix.