libsockmux-glib is an implementation of the sockmux protocol, using GIO data types and using glib functions internally. The interface offered to applications is very simple and straightforward. sockmux specifies a simple way for muxing messages and data streams onto a single socket for network and local communication streams.
Collage is a cross-platform C++ library for building heterogenous, distributed applications. Among other things, it is the cluster backend for the Equalizer parallel rendering framework. It provides an abstraction of different network connections, peer-to-peer messaging, node discovery, synchronization, and high-performance, object-oriented, versioned data distribution. It is designed for low-overhead multi-threaded execution, which allows applications to easily exploit multi-core architectures.
Linfo displays system statistics such as disk space usage, network usage, hardware information, mounted file systems, hard drives, RAM, hostname, uptime, etc. The Linux version works by parsing the /proc and /sys filesystems and also by connecting to daemons such as hddtemp for determining physical health.
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.
RSound is a simplistic and lightweight framework for networked TCP/IP audio. It is designed to be very simple to implement, and to work well with music and video players. A librsound is supplied. It is not designed for low latency audio (games), and lets the sound backend take care of sound mixing. It supports POSIX-compliant systems (including cygwin). It includes audio output support for ALSA, OSS, libao, and PortAudio.
Fyrewall is a full featured firewall system based on FreeBSD. It comes with an easy installation interface. Fyrewall includes features such as full control via a Web interface, an aliasing system for easing management of firewall rules, failover clustering support via CARP, load balancing, integrated VPN support for many popular protocols, traffic and system statistics reporting, and the packaging system.
By using the nmblookup facility from Samba, and configuring hosts to use the WINS service, IP-ID lets you resolve named hosts within your local network. As an added feature, IP-ID can discover and add a hostname for an Xbox running XBMC, allowing simple and repeatable FTP transactions with the Xbox. By drawing on the functionality provided by the MiniUPnP project program, IP-ID can also configure UPnP port forwarding to machines to allow SSH access from the wider world.