Guake is a drop-down terminal emulator for GNOME (GTK2). The application is inspired from consoles in computer games, such as Quake, in which the console slides from the top of the screen when a key is pressed. In the same way, Guake can be invoked and hidden using a single key (though Guake can also automatically hide when it loses focus).

FrostWire is a free, open source Java downloader, BitTorrent client and media player, which comes with a built-in multi-tracker search (like TPB, Yify, Mininova, etc.) as well as YouTube and SoundCloud search/download support. The application is available for Linux, Windows, Mac OS X and Android.

PeerTV allows you to easily keep track of your watched / unwatched episodes: each viewed episode is automatically marked as seen and you can manually mark/unmark episodes as viewed - and of course, you play them with the help of Peerflix, with subtitles support.

For those not familiar with Tribler, this is an open source, decentralized peer-to-peer client based on the BitTorrent protocol, supported by EU and Dutch research funding. The application includes features such as wiki-style channels, video-on-demand (watch videos while you download them) and more and is available for Linux, Windows and Mac OS X.

BitTorrent Sync is a tool that can be used to automatically synchronize files between computers using the BitTorrent protocol, available for Linux, Windows, Mac OS X and NAS devices.