PCE is licensed under GPL. 
see under (help/gpl.txt or http://www.fsf.org/licenses/gpl.txt)

the icons in /config/ico/jenne are licensed under lgpl

the doku is licensed under GFDL



Perl is licensed under the GPL or artistic license (artsitc.txt)

wxWindows is licensed under the wxWindows license (wx-licence.txt)
wich is a derivat of the LGPL (lgpl.txt or http://www.fsf.org/licenses/lgpl.txt)

Scintilla ist licensed under Neils license (scintilla.txt)
