statsd-go is a reimplementation of statsd in Go (forked from gographite) with Ganglia submission support.
statsd-c is a reimplementation of Etsy's famous/infamous "statsd" in C.
rrd-merge merges RRD (round robin database) files together, including the files used by Ganglia, Cacti, and other rrdtool-based software.
Top quality printer drivers for POSIX systems.
A Java bytecode viewer and class modification library.