PHP-wise I'm involved in the Smarty Template Eninge,
created a PHP CFPropertyList (Apple's .plist, xml and binary),
some yet undocumented CommandLine Application Utility.
and the Viewport Units Buggyfill
amongst other smaller projects at github.com/medialize
I've been working on few large and time consuming projects, rather than many small things.
Lakeparty.de has gotten the bulk of my time and resources in the past years.
I did the architecture of the software and was involved in the system architecture and customer support.
saunierduval.com and vaillant.de are website relaunch projects I consulted on.
gallestro.de (the web application) also received quite some attention.
I architected and implemented the application - from flexible data handling tools to worklfow guidance,
automatic visual analytics. Integrating a whole bunch of foreign systems (MS Office, to name something well known).
and a whole bunch of (business intelligence) tools you probably won't know anyways.
bodensee.de's front end was implemented by @derSchepp and me.
cruise.ch and schwaebische.de are platforms
I did consulting work for.
ticedo.de, a system somewhat like eventbrite was built by trainees under my supervision.
bonanza-events.de is one of the few actual (small and simple) websites I built.