iCab Mobile is also one of the only truly unique iOS browsers. Was the only way to reliably download multiple files for years on iOS, and today still is the closest to having browser add-ons in iOS. Supported uploading files long before Safari too. Its custom zoom levels made many web apps usable on the original non-pro iPad screen sizes as you could fake a higher resolution screen (and you could change your user agent if websites refused to show their desktop version). You can tweak iCab's interface quite a bit too, which makes it a great way to make an internet appliance of sorts to show a single website without having extra toolbars and stuff.

It's not my default browser, but is a great tool to keep around!