libnode is a C++ implementation of Node.js. Just like Node.js, libnode provides non-blocking I/O, which enables you to develop scalable Web applications in C++. The memory management of libnode is automatic, based on either shared_ptr or bdw-gc. libnode is good to use on embedded devices because its system resource consumption is lower than Node.js.
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.
The p2pd package can be used to build scalable content distribution networks (CDNs) for interactive video-on-demand (VoD) streaming. It can be used as a server, a cache, and a client, and used to construct both traditional CDNs and P2P-based CDNs that make use of client resources to stream video files. The system is network aware, attempts to make efficient use of the available resources, and adapts to server failures.
XMLFoundation provides a foundation for XML support in an application. However, it is more than just another XML parser. It applies a unique approach to handling XML that allows your application code to focus on the application rather than traversing DOM or subscribing to SAX events. The most unique feature of the XMLFoundation is the object oriented encapsulation that provides XML support in the application layer. XMLFoundation allows you to easily integrate XML with your GUI or with your server objects, and it natively supports COM, DCOM, and CORBA objects.
sessiond allows a cluster of SSL/TLS servers to share their session caches in order to prevent each node of the cluster from negotiating a separate session. SSL/TLS session is basically a set of secret values (symmetric encryption keys, MAC secrets) shared between a client and a server. The use of asymmetric cryptography required to establish new sessions is the main performance bottleneck of the SSL/TLS protocol.
sxmppd is a server for the XMPP (Jabber) chat protocol. While other, functional XMPP servers exist, they are not as simple or have many dependencies. It supports user authentication, SSL, roster management, presence updates and subscriptions, messaging (local users), group chat, and file-based server configuration.
gitolite is an access control layer on top of git. It allows you to setup git hosting on a central server, and have multiple "virtual" users (i.e., not "Unix" users) access multiple git repositories, with fine grained access control (read control at the repo level granularity, write control at branch/tag/file/dir level). It has several other features, comprehensive documentation, does not require root permissions, and does not depend on anything except git, Perl 5.8 or later, and any POSIX shell.