spmfilter is a mail filtering framework. It attempts to be a general filtering framework for any purpose. The API enables spmfilter plugins to access messages as they are being processed by the MTA. This allows them to examine and modify message content and meta-information during the SMTP transaction. Plugins are loaded at runtime and can be processed in any sequence. The processing chain can also be altered by a single plugin, for example if the plugin has to stop further processing.
Syncless is an experimental, lightweight, non-blocking (asynchronous) client and server socket network communication library implemented in Stackless Python 2.6. It contains an asynchronous DNS resolver (using dnspython) and an HTTP server capable of serving WSGI applications. It aims to be a coroutine-based alternative of event-driven networking engines (such as Twisted and FriendFeed's Tornado). It is already about that fast, but it has fewer features and is less stable now.
TomP2P is a P2P-based high performance key-value pair storage library. Each peer has a table (either disk-based or memory-based) to store its values. A single value can be queried or updated with a secondary key. The underlying communication framework uses Java NIO to handle many concurrent connections.
bscallmon is a small GUI tool that allows you to view the list of incoming and outgoing phone calls on routers running the BitSwitcher firmware without having to log into the router's Web interface. Features include a phone book, custom icons, unlimited call list size, and optional systray integration and call notification. It does not require compiling and runs on both Unix and Windows systems.
URL Notification System (UNS) uses simple Web pages to show messages and alerts around your campus. Every zone can have its own custom messages, and an emergency mode can be set that overrides all pages in all zones. Active Directory is supported for user access. RSS feeds are supported. Lists of URLs can be copied from one client to anther or from another client zone.