mod_bt is an Apache2 module that behaves like a BitTorrent tracker. As well as supporting the full BitTorrent tracker specification, it has several other useful options, most notably seamless integration with the Web server.
sitecopy is for easily maintaining remote web sites. The program will upload files to the server which have changed locally, and delete files from the server which have been removed locally, to keep the remote site synchronized with the local site with a single command.
Simple Page Archive is a mirror and archiving tool to copy Web pages you are interested in. The CGI script downloads all images and CSS files to preserve the mirrored Web page.
Plowshare is a command-line downloader and uploader for some file-sharing websites. Sites currently supported:
Megaupload: download (anonymous and free membership), upload (anonymous and free membership)
Rapidshare: download (anonymous), upload(anonymous and free zone)
2Shared: download and upload