Mongrel 1.1.1
This one (Mongrel onepointonepointone ) is just a little bug fix, fixing the Mongrel 1.1 mongrel_rails restart bug. Mongrel is a web server, that is cooler than a brick, and if you have used TomCat in the past, or heard of TomCat, you might understand the inside joke (TomCat vs. Mongrel (Dog)).
Most of the cool people who understand this stuff (wink, wink), are letting the cat out of the bag, because a dog is man’s best friend. But this really not really not a cat-fight, or even Cat vs. Dog fight, since even the guy who wrote TomCat has switched to Mongrel.
Update 10-Apr-2008: Mongrel foot prints lead here now.