Causal is involved in several open source projects, namely:

• Barcode Generator (Leader, 2011-05-16)
• CloudFlare Client (Leader, 2012-05-22)
• Core (Member, 2009-12-09)
• DBAL (Leader, 2009-05-05)
• Direct Mail User Functions (Leader, 2009-10-10)
• Dropbox API (Leader, 2010-11-02)
• eGov API (Leader, 2010-10-20)
• Extended Links (Leader, 2009-07-29)
• File List (Member, 2009-12-28)
• File Upload (Co-Leader, 2011-04-14)
• Form (Member, 2011-10-10)
• jQTouch for TemplaVoilà (Leader, 2010-06-28)
• LDAP / SSO Authentication (Member, 2009-05-29)
• Mantis Connector (Leader, 2010-08-03)
• Metadata in TS (Leader, 2008-07-17)
• MVC + ExtJS (Leader, 2009-08-01)
• MVC + ExtJS samples (Leader, 2009-07-17)
• My TYPO3 (Leader, 2011-02-23)
• Resize images automatically (Leader, 2010-07-21)
• reST Documentation Viewer (Leader, 2012-05-01)
• ReST tools (Member, 2011-10-27)
• rggooglemap (Member, 2010-01-17)
• Sphinx Python Documentation Generator (Leader, 2013-04-17)
• Translation Team (Co-Leader, 2011-04-04)
• translation.typo3.org (Co-Leader, 2012-08-31)
• TYPO3 4.6 Projects (Leader, 2011-03-02)
• TYPO3 4.7 Projects (Member, 2011-11-04)
• TYPO3 Cloud Infrastructure ability (Member, 2012-12-18)
• XLIFF (Leader, 2011-08-26)