Coherence is a set of DLNA/UPnP devices, like MediaServer and MediaRenderer. In addition, it includes a well-designed framework to extend other applications with DLNA/UPnP functionality. It also has an emerging DBus API, enabling these applications to participate in digital living networks. It supports Playstation 3 (PS3), XBox, and many other devices.
p300 is a P2P application that allows you to share directories with other computers on a LAN or VPN. Other hosts running p300 are automatically discovered using IP Multicast. Bandwidth limiting is supported. You can configure which hosts may access your shared directories. You can use an integrated browser and download manager to download files from other p300 programs on your network, or use your Web browser. You can also use WebDAV to mount the directories from other computers. A search function and an integrated chat (instant messenger) are available.
Nicotine is a feature-complete client for the SoulSeek filesharing network. You can use it to upload, download, search, and chat. You can keep a "buddy" list and basically everything else a SoulSeek client is supposed to do. If you are familiar with PySoulSeek, you'll probably notice a striking resemblance in appearance.
NapShare is a fully-automated Gnutella P2P client, made to run unattended. Supply a list of keywords and it will download overnight, also sharing whatever it gets. It has a full GUI using GTK with all the features you would expect from a Gnutella client. All file types are on Gnutella, including MP3, MPG, JPG, TXT, AVI, and more. It interoperates with BearShare, Gnucleus, LimeWire, and others.
OSLA (Open Source Logistics System) is an open standard Web system for logistics featuring support for shipment, tracking, barcode labelling, a 3rd-party interface to industry document messaging format APIs of DHL, FedEx, UPS, etc., document export to CSV to make invoicing more convenient, cargo manifest, a multilingual interface, user permission administration, data analysis, statistical reports and graphs, and more.