a module to let Hadoop digest terabytes of MediaWiki dumps with full page history
a Lucene-based full-text search and visualization system for MediaWiki revisions
fast suffix-array algorithms to identify repeats
a machine learning library powered by SWIG
an Android app for sharing free photos
an automation framework for MediaWiki websites
ウィキペディアについての本 Good Faith Collaboration (Reagle, 2010) 、日本語訳
For more, see my repositories and papers.