jessemiller's HamlPy - I need to check this out, an implementation of HAML (basically a shorthand notation for HTML) with integration for Django. This could be interesting for the many small internal templates, as they are created by programmers and not designers. However, I would first have to see how well (or how poorly) I can integrate JavaScript with it. But definitely interesting - HTML is not really Diff/Merge-friendly and simply annoying to write and read.