I have always been fond of tools that makes life easier....
I recently needed to recompile one of my papers in Greek and mytex did - once more - its job perfectly well.
I made it during my stay at the National Hellenic Documentation Center in order to handle masses of LaTeX-based (!!!) documentation I had produced there.
mytex helps one with the parsing of LaTeX files written in mixed greek and english. It can automatically insert proper babel commands for the language switches.