Ruby Gems:
- m9t - Handles distances, speeds and other measurements, giving unit conversions and localizations, RubyGems.org
- metar-parser - Downloads, parses and presents weather reports, RubyGems.org
- sun-times - calculates sunrise and sunset times for a given location and date, RubyGems.org
- HTML5 canvas - a Javascript library of HTML5 canvas utilities
- bash-clj - a Bash launcher for the Clojure REPL
- configurable_authentication - A Rails plugin the provides basic functionality for session-based authentication
- sloccount-clojure - a Clojure implementation of sloccount
I have some older stuff on SourceForge:
- regexobjc - an Objective-C wrapper for PCRE
- activerecordobj - an Objective-C implementation of ActiveRecord
A perl module on CPAN:
- Database::Wrapper - A truly unified perl database API, with a query cache.
A cross-platform file manager:
- Sherpa File Manager - A flexible, cross-platform graphical file manager written in C++/wxWidgets.