microjs - I'm not sure where the line is between "code snippet" and "micro framework" but there are a bunch of 5K and under useful chunks of JavaScript here.
Amber - An implementation of Smalltalk-80 on top of JavaScript. Resin is a Sinatra application to bootstrap an Amber project.
wiserespond - Another approach to simplifying Rails controllers.
wisepdf - Next generation ruby wrapper for wkhtmltopdf.
About those vector icons - Why you can't just expand and shrink one vector image and expect to get good icons at all possible sizes.
Alternatives to Pivotal Tracker - People are a bit worried about the EMC buyout of Pivotal Labs. As a result I've seen a bunch of alternatives to PT bandied about. Here are a few to check out: