TheWorld Browser is a tiny, fast, safe, powerful, multi-tabbed with multi-threaded frame browser, it is a freeware with no function limited.

It has a new, powerful multi-threaded window frame, which can avoid web page being out of response.
It is optimized to avoid any case of out of response. In any test case, if a web page's browser window is out of response, the other windows will not be infected.

http://www.ioage.com/en/product.htm