Huntor is a full-featured command line Bittorrent client. It currently has no GUI. This client focuses on being run in the background, such as on servers. It is highly customizable. Its disk storage layout makes it easy to incrementally rsync the data to a different machine while downloading.
Openline is the open source version of Hotline. Hotline is a PC/MAC client/server application that provides users the ability to create and manage a desktop community. The application has file uploading and downloading, instant messaging, a bulletin board, threaded news, and public and private chat.
SlashOrg Downloader is a PHP file management solution. It uses special "access links" generated by the administrator that allow access to a shared folder until they expire or have exceeded the maximum usage limit authorized. It also features easy installation, multilingual support, per- folder and per-file rights management, simple Web- based administration, user accounts and user rights management, file uploads, download speed limits, ISO and Unicode support, and much more.
gsendfile is a frontend to the Unix tools sendfile and receive. Unlike FTP, sendfile (and the saft protocol), allows asynchronous file transfer via the Internet (similar to e-mail). gsendfile lets you browse your inbox and send, store, preview, and delete files/archives. It also allows you to add people to a list of contacts, making it easier to remember their logins and hostnames.