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.
STPsim is an application that simulates and visualizes switches using the Spanning Tree Protocol. It features a GUI to build and control a custom network topology. A VPython frontend visualizes virtual switches and network cables in a 3D environment. To visualize STP-states, switches and ports change colors and captions in real time.
MediaTomb is a UPnP media server with a nice Web user interface. It allows you to stream your digital media through your home network and play it on a variety of UPnP compatible devices. MediaTomb implements the UPnP MediaServer 1.0 specification. The current implementation focuses on parts that are required by the specification. MediaTomb should work with any UPnP compliant MediaRenderer.
djmount is a UPnP AV client. It mounts the media content of compatible UPnP AV devices as a Linux filesystem (using FUSE). The audio and video content on the network is automatically discovered, and can be browsed as a standard directory tree. djmount should work with any UPnP AV compliant devices or software servers. Currently tested devices include TwonkyVision UPnP Music Server on Linux, GMediaServer on Linux, GeeXboX uShare on Linux, Ahead Nero MediaHome Server, and Microsoft Windows Media Connect.