In addition to this site, I have a few other projects:
SPARKS
A simple 'spark file' editor that allows for the creation, editing, export of multiple sparks files.
PHP rssCloud server
An rssCloud server implementation in PHP.
This has been inspired heavily by Andrew Shell's server in node.js. A key difference here is that subscriptions are not removed after 25 hours so do not need to be refreshed.
PHP rssCloud server on GitHub.
PHP-MST
PHP-MST is a simple PHP implementation of My Status Tool by Andy Sylvester.
In Andy's words:
My Status Tool is an application that provides the basic posting and reading functionality within Twitter, but using RSS and rssCloud as the enabling technologies.
hyblog
The name is an amalgam of hybrid and blog. It is a different approach to database driven systems partly inspired by Static Site Generators but with a more dynamic approach. Rather than having to build the site after each change, hyblog uses dynamic files which write/pull posts and comments to/from .md files on the fly.