PRTG Network Monitor is an all-inclusive monitoring software solution developed by Paessler. Equipped with an easy-to-use, intuitive interface with a cutting-edge monitoring engine, PRTG Network Monitor optimizes connections and workloads as well as reduces operational costs by avoiding outages while saving time and controlling service level agreements (SLAs). The solution is packed with specialized monitoring features that include flexible alerting, cluster failover solution, distributed monitoring, in-depth reporting, maps and dashboards, and more.
Overdose is a simple Yahoo! Chat client written in C, and using the curses library for text I/O. It is multithreaded using pthreads, and works on Linux/BSD/Unix and Windows.
SuperVixen is an IRC bouncer written in C, and uses pthreads to manage connections (from clients and to IRC server). It's pretty basic and allowes you to have several clients connected to the bouncer at the same time.
GUSI (Grand Unified Socket Interface) is a POSIX/Pthreads/Sockets library bringing some of the comforts of UNIX 98 to traditional MacOS (7.0 - 9.9999).