Python OS is an environment for Python and Pygame applications to run in.
With Python OS 3.2.0 and onward, Python OS supports "layered multitasking", so that there can be several applications open at once, while the status of the last application is preserved.
A Guitar Tuner that I wrote in python and pygame. Tested with 2.7 and 3.2, works for both.
PyHiero is a library that helps use the Hiero Bitmap Font generator (http://slick.cokeandcode.com/demos/hiero.jnlp) with the Pygame font engine. Simply generate your bitmap font file, load it into PyHiero and draw the Hiero fonts like you would draw a regular Pygame font!