Maxthon has been downloaded more than 200 million times and is one of the few browsers to have mouse gestures as a standard feature. Users can hold the right mouse button and use a variety of motions to emulate clicking navigation buttons. It's also got a built-in RSS reader and a screen-capture utility. Its development started when the creator, fed up with the lack of customization in Microsoft's Internet Explorer, decided to make his own browser.
While Maxthon doesn't show up as a major contender in most market share reports, it's worth noting it's the second-most popular browser in China.