Downloadermac is a Cocoa application for downloading items from the Internet. It frees up your browser for other tasks by reducing the load on your Web browser's process by creating a thread just for downloading items.(e.g. firefox-bin, safari). It is tested on both Panther (10.3.9) and Leopard (10.5).
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.
MirrorBrain is a framework to run a content delivery network using mirror servers. It solves a challenge that many popular open source projects face: a flood of download requests, often magnitudes more than a single site could practically handle. A central (and probably the most obvious) part is a "download redirector" that automatically redirects requests from Web browsers or download programs to a mirror server near them. Choosing a suitable mirror for a user's request is the key, and MirrorBrain uses geolocation and global routing data to make a sensible choice and achieve load-balancing for the mirrors at the same time. The algorithm is both sophisticated and easy to control and tune. In addition, MirrorBrain monitors mirrors, scans them for files, generates mirror lists, and more.
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).