Keynot.es is a current and ongoing startup I am involved in along with 2 other partners. It is a social conference directory that helps to connect speakers, attendees, and conferences together in a meaningful way, and helps aid discovery of upcoming conferences or speaking opportunities through interest-based notifications and social connections. Keynot.es is currently in heavy development, and we are shooting for a late 2010 launch. Keynot.es is developed with Ruby on Rails, and is currently deployed to Heroku.
Alloy HMVC PHP Framework is a new PHP 5.3 framework that uses a modular Hierarchal Model-View-Controller architecture. Alloys aims to strike a balance between ease of use, power, and flexibility. Alloy borrows some ideas from Merb and Rails3 for the URL Router, and mixes in ideas of its own like modular organization, HMVC sub-request dispatching, and handling HTTP and CLI requests though the same dispatcher to make running backend processes (cron and workers) easier.
All the open-source projects I am currently working on are hosted by GitHub:
Actridge GitHub account (my personal business):