You might want to see my papers on the ArXiv.
Sheffield semester dates
Here is a zipped PHP library for Sheffield semester dates (preloaded with the years 2014-2028). I have found it useful for course webpages.
I wrote a simple octrees library in Python.
Sparse Ramsey Theory
In 2003 I wrote up some notes on sparse Ramsey theory from a lecture course by Imre Leader, which serve as a useful introduction.