pDonkeyS is Perl implementation of an eDonkey server. The main goal of the server is to provide framework for further eDonkey protocol exploration, but it could be useful in testing of client software, since the server can be configured to output very detailed debugging info about eDonkey traffic.
Vayala is a multi-purpose chat client for developers. It offers a platform and an easy to use Eclipse plugin. Based on multicast technology, each client is automatically connected to one chat client network without a central server or much configuration or installation effort. You add the Eclipse view, and you are connected to your colleagues. In addition to basic chat functionality, you can also exchange files, graphics, and much more.
Torrent Swapper is a sociable peer to peer file-sharing client based on the BitTorrent protocol. It has a basic understanding of human friendships, of user tastes in content, and of Internet connectivity between users. Torrent Swapper boasts unique features like Amazon-like recommendations to get interesting files, doubling the download speed by using the upload capacity of friends, real-time P2P file sharing with P2P video streaming, and showing the locations of seeders and leechers of the same content with city-level accuracy on a world map.
BluetoothSender sends files over Bluetooth to paired devices using OBEX Object Push from the command line. It is created to allow automated/scriptable sending of files to Bluetooth devices. This utility is intended for embedding in scripts and has no user friendly graphical interface.
AdslShare aims to be a powerful file sharing tool. It is built with modularity in mind. Each piece of the software is a plugin that can be loaded at start time. It currently has a GTK+ 2.x interface and a Gnutella protocol plugin. Planned features include the ability to download from different hosts, resume downloads and uploads, a new protocol with a more intelligent download engine, and a scripting interface.