iOS: Safari is an OK browser on the iPhone, but it's surprisingly unsatisfactory on the much larger-screened iPad. Perfect browser completely changes the iOS browsing experience, bringing tabbed browsing, user agent control, touchscreen gestures and hyperfast scrolling to your fingertips.
The somewhat pompously (yet accurately) named Perfect Browser is available for all iOS devices but really shines on the iPad, where an alternative browser is a must-have in your arsenal of apps. Perfect browser is one of the most feature-filled ones out there, adding features you probably miss from desktop browsing, like tabs, hyper or automated scrolling, session saving, popup blocking and more. What's even better is that it also adds features designed to compliment the iPad's touchscreen (like a wide range of gestures that cycle through your tabs, browser history, and even toggle a fullscreen mode). On top of all that is a handy user agent switcher, for those times when your device refuses to cooperate and show you the desktop version of a web page.
As if that weren't enough, Perfect is full of other, slightly more niche features. For example, you can scroll through scrollbar-less frames on the occasion you end up on a website that doesn't want to cooperate. You can also save any web page for offline viewing later, which is pretty awesome. There's also a nifty web compression feature which uses Google's mobile rendering for pages that aren't formatted for mobile. It changes the layout of most sites pretty drastically, but is really nice if you're on an iPhone, or pages are just taking a long time to load over 3G. Honestly, a few minutes with this browser and I was hooked — Safari be damned, this is what browsing on the iPad was meant to be like. Hit the link to check it out.
Perfect Browser is a $1.19 download for all flavours of iOS.
Note: I can already hear many of you Atomic fans shouting for recognition, so I will mention that previously mentioned Atomic browser is another great alternative, and has a lot of the same features that make Perfect so great. I personally give Perfect the edge for its scrolling features, but other users may prefer Atomic for its custom search engines or the ability to view a page's source. If you're looking for an alternative iOS browser, both are great options.