Wikka is a php Mysql wiki open source software that permit the integration of free mind maps. As such it is shortlisted to become the engine of the wiki for my website
K. Yank. dpunkt-Verlag, Heidelberg, 2., aktual. und erw. Aufl., Übers. der 3. engl. Orig.-Aufl. edition, (2005)Build your own database driven website using PHP & MySQL <dt.>.