I’ve just finished (mostly) documenting and writing tests for my latest little library, gmail-britta, so thought I should release it to the world as a sort of holiday gift. Gmail-britta is a library that lets you write Gmail filters (hah, Britta, get it?) in a way that doesn’t drive you insane - you write them as a ruby program, run that program, and out comes XML that you can import into Gmail’s filter settings.