The latest stable version of Chimera was released a couple of days ago, and I am falling further in love with this browser. Powered by the Gecko rendering engine (of Mozilla fame), it is a Cocoa-based web browser, only for OS X.
It shares some of my favorite features with its Mozilla brethren, as well. Tabbed browsing is just one of the coolest things to hit web browsers since standards compliance. No more multiple browser windows littering the desktop! And built-in pop-up ad blocking is a godsend.
If you’re running OS X, you owe it to yourself to give Chimera a try.