FatRat is a download manager that is rich in features and is continuously extended. Its features include HTTP(S)/FTP/SFTP downloads, FTP/SFTP uploads, RSS feed support with special functions for TV shows and podcasts, BitTorrent support (including torrent creation, DHT, UPnP, and encryption), torrent searching, Support for SOCKS5 and HTTP proxies, RapidShare.com FREE downloads, RapidShare.com uploads, RapidShare.com link verification and folder extraction, RapidSafe link decoding, MD4/MD5/SHA1 hash computing, remote control via Jabber or a Web interface, and YouTube video downloading.
Minitube is a YouTube application for Mac, Linux, and Windows. With it, you can watch YouTube videos in a new way: you type a keyword, and Minitube gives you an endless video stream. Minitube does not require the Flash Player. It is not about cloning the original YouTube Web interface, but strives to create a new TV-like experience.
YourTube is a YouTube video downloader for mobile phones that support J2ME. Its main features are the ability to search YouTube videos, support for multiple video formats (MP4, FLV, 3GP), support for background downloading, and a download queue. The minimum requirements are MIDP-2.0, CLDC-1.0, and JSR 75 (File Connection API).
Movgrab is a command-line movie downloader for sites like YouTube. It has no dependencies; everything that's needed should be there in the tar.gz package. Movgrab can connect through an HTTP proxy, can output the download to stdout for piping into another program, and can fork into the background to free up the console. When forked into the background, its progress can still be seen in a ps list.