SlimJet is a Portable Web Browser that was formerly called SlimBoat. This Portable Browser is amazingly fast to startup and load web pages.
Some key features include a Bing Search Engine, translator for quick language translation, pop up blocker to block popup ads - In addition to a built in ad blocker similar to adblock to block all other forms of advertisements. A download manager to help you finally manage your file downloads. Along with a web inspector tool that is similar to firebug. And last but not least, a YouTube Video Downloader.
It is powered by the webkit engine and was originally created by FlashPeak Inc.