Here are some open source software packages I've written, and or maintain. All of these programs are written in one of my two favorite languages. OCaml, and Haskell
A complete, high performace, implementation of the ldap protocol in Objective Caml. Including a library for creating ldap servers.
web site ocamldap-2.1.8An ldap server which translates all updates from standard data format into Microsoft Active Directory format. It is designed to be updated with slurpd
web site tdir-1.1.1An implementation of the syslog protocol in Objective Caml, for talking to the logging service on a unix computer.
syslog-1.3A utility to mine the data in Caml compiled interface (cmi) files, and elisp that allows emacs to use cmigrep for completion, see cmigrep.el.
cmigrep-1.5A utility to draw a pretty graph of a time series in an ansi terminal. Here is a graph of my machine's load average.

The data is generated by a small shell program
while true
do
uptime | sed -e 's/.*load averages://' | awk '{print $1}'
sleep 1
done | ./graph -range 0 3 -green-range-high 1 -title "Load Average"
graph-1.0
An ini file parser, in case you ever need to parse one of those little buggers.
inifiles-1.2