[GeronL]

Pale Moon is a fork of Firefox that would be worth a look

[CutePuppy]

Pale Moon is good, light. Also take a look at SlimBoat, Comodo IceDragon and Comodo Dragon (based on Chromium open source).

QTWeb is a small, powerful IE-based browser with some nice features (e.g., saving a Web page as PDF).

[FreedomOfExpression]

Pale Moon is a fork of Firefox that would be worth a look

Also worth a look is SRWare Iron, similar to Google Chrome, but without Google's snooping.
I went ahead and added a link to Pale Moon in my reply.