Marc Worrell maintains a couple of Open Source projects. Most notably are:
OAuth-PHP is a PHP library implementing both the consumer and server side of OAuth. You can easily integrate it in your web software to either accept or make OAuth authenticated requests.Verso Wiki
A wiki library that translates Wiki to XHTML and XHTML back to Wiki. It is written in PHP and is useful when you want to have a fast way of publishing texts with Wiki markup.Depcached
A variant of memcached, with added dependency keys, queues and garbage collector.wok-imager
Wok-imager is a WordPress plugin for automatic resizing, cropping and editing of images.