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).
TorrentGrab is a script that searches isoHunt for specific keywords, parse results using regular expressions, and then downloads episode numbers not located in saved list. It's not too user friendly. Although configuration is straightforward, it still requires you to know regular expressions.
HeldenViewer makes it possible to search for, download, and view Youtube videos in a very easy to use fashion. An important feature is the concept of adding authors as favorites, in order to be notified at the next start of HeldenViewer if the author has uploaded a new video. You will no longer be interrupted by any commercials. Much like the Youtube platform, you can watch the videos while downloading and use your favorite videoplayer to do this. The only restriction is that the video player must be able to play .flv files, e.g. VideoLanClient.
Awake File is a framework that allows Android and Java Desktop developers to very easily implement file uploads and downloads through HTTP. Security has been taken into account from the design stage: server side configuration allows you to specify strong security rules in order to protect the files. It allows listing, creation, and deletion of remote directories, calling of remote Java methods, and displays nice progress indicators to your users.