...FingerID since version 1.4 will be hosted on github: https://github.com/icdishb/fingerid
A metabolite identification software using tandem mass spectrometry and kernel methods. The related paper can be found at http://bioinformatics.oxfordjournals.org/content/early/2012/07/18/bioinformatics.bts437.abstract.
Now it supports unix/linux like system.
PyChemEq is an Open Source project which goal is to simulate chemical equilibrums. It provides classes (that are the project's "kernel" ) and a user interface using PyGtk and Glade. The whole project will be written in Python.