Here is some software I’ve written in my spare time or that my previous employers allowed me to publicly release.
pkgr - Easily package your Rails app into deb or rpm packages. After a few months of dealing with the various intricacies of packaging Ruby apps for debian or centos, here is a gem that does everything for you.
restfully - A Ruby client for RESTful APIs.
rest-client-components - Rack should not be limited to HTTP servers, it’s also a very good client-side abstraction for pluggable middleware!
g5k-campaign - A tool to launch experiment campaigns on Grid’5000, based on the concept of extensible campaign engines.
syslogger - Finally a proper syslog library for Ruby. Can be used as a drop-in replacement for the standard Logger library.
toggl-notifier - Hack! Update your Adium status with the description of your current task in Toggl (Mac only).
You can find more on my Github account.