Projects

I have written code for 29 years, in many different languages, and still enjoy being able to craft things out of basically nothing. Being aware that our work is always built upon the work of others I believe in OpenSource and try to follow its principles. I prefer GPL over MIT. More details can be found at My Background.

While not actively contributing to Open Source or public projects in the recent years, this is where I grew up and learned a lot. I still like the general idea behind it, while I think that MIT-like licenses and communication culture in many Open Source are more likely to cause burn outs especially for maintainers then help our society. I will still release any sensible idea as OpenSource but generally prefer GPL-like licenses.

Loosely Maintained

I am not actively maintaining any projects right now. Some projects are still alive and I am available for urgent fixes:

• Portalific

  
  Portalific is an OpenSource browser based portal, displaying your feeds, your calendars, and other information of personal relevance. It works (almost) entirely browser-based, so your data is safe and secure. For cross-device synchronization you can optionally use a backend to synchronize the data continuously between devices.

• Zeta Components

  
  MIT licensed set of general purpose PHP components – I wrote the documents, graph, and webdav components. Probably the first test-driven-development project in PHP, with high quality components, but never gained sufficient traction.

• Data Object

  This repository just contains a simple base class for PHP data objects. This class throws exceptions if you try to read or write unknown properties, and ensures a clone is performed recursively.

• XML Schema Learner

  This software implements various state-of-the-art algorithms for algorithmic learning of XML Schema definitions and Document Type Definitions. Project is the result from tmy thesis.

Contributed To

• PHPUnit

  
  The most popular PHP testing framework – I maintained the now deprecated mock objects for a while.

• Doctrine

  
  Database storage and object mapping (ORM) libray – I helped creating the CouchDB Document Mapper.

Sunsetted

• Arbit

  I tried creating an extensible issue tracker, but failed for technical and project reasons.

• PHPillow

  First CouchDB library for PHP, poisoned by static methods.

• Image_3D

  PHP 3D rendering library – do not use in production – just a fun experiment.

• Kaforkl

  Use images to code, with a immense threading – only an experiment.

• Torii

  Simple feed reader, I still use myself, but probably should not be used by anyone else anymore.