Mewseek!

dTunes is an iTunes equivalent for jailbroken iPhones and iPod Touches. It plays downloaded music and video files and torrents, and provides direct access to music and video sites for downloading files. You can only get dTunes from Cydia (on jailbroken iOS devices).

Safari Download Manager is an extension for jailbroken iPhones that adds a download manager to the web browser. It allows you to download files to your iPhone, which can then be viewed with the app iFile