XSRCG is a Shadowrun 4th Edition Character Generator for Mac OS X. Other tools, such as a dice roller and GM and Player aides will be developed alongside XSRCG as well.
SimPy is an extensible object-oriented discrete event simulation package for Python 2.3 and later. It uses generators for efficient implementation of coroutines. It has a GUI and a plotting package. Tutorial, manuals and many examples are included.