From OpenSCADAWiki
TDE is based on KDE3 and in year about 2010 it was founded by forking from the last official version KDE3 3.5.10 (2008.08.26) with trying to merge Qt3 with Qt4 by the tqtinterface, and that has been terminated now and the project is busy on rebranding both Qt3 and KDE3 to TDE with their "enhancing", that is creation new bugs and conservation old ones with factual throwing down the support of five (5) year old systems. In the main branding there was released the versions 3.5.11, 3.5.12 and 3.5.13 before Trinity(3) 14.