Easy Handling of Static Resources with MavesMate
I've been using MavensMate exclusively (ok, minus the odd developer console usage) for the development of all our products at S. P. Keasey and Proximity Insight and I can't recommend it highly enough; if you listen to Code Coverage it's obvious how much the community loves it too.
Resource Bundles FTW
Joe Ferraro (aka. Mr. MavensMate and the Saviour of Developers everywhere) provided an excellent YouTube video of how they work so I'm not going to explain them here again, I just wanted to draw attention to them for anybody who may have missed them as I did.