Wireshark Developer's Guide
http://www.wireshark.org/docs/wsdg_html_chunked/index.html
curl
memcached
nginx
squid
wget
netcat
nmap
Berkeley DB
tor
prozilla
statis
http://www.cs.berkeley.edu/~sears/stasis/
http://sewm.pku.edu.cn/src/
Sphinx
http://www.sphinxsearch.com/
firtex
IRIS
http://project-iris.net/software.html
Tokyo Cabinet
http://tokyocabinet.sourceforge.net/tyrantdoc/
http://www.openfiler.com/
parallel processing, data mining, bioinformatics, and collaborative filtering
http://glaros.dtc.umn.edu/gkhome/software
Derby
http://db.apache.org/derby/index.html
The GiST Indexing Project
http://gist.cs.berkeley.edu/
capriccio
http://capriccio.cs.berkeley.edu/
fragroute
http://monkey.org/~dugsong/fragroute/
Tsunami UDP Protocol
http://tsunami-udp.sourceforge.net/
http://ebtables.sourceforge.net/
openvpn
brctl
cassandra
CouchDB
Hypertable
libgds
http://libgds.info.ucl.ac.be/downloads.php