Berger, Florian and Müller, Wolfgang: Towards an Open Source Game Engine for Teaching and Research. In Pan, Zhigeng, Cheok, Adrian, Müller, Wolfgang, Chang, Maiga, Zhang, Mingmin: Transactions on Edutainment VIII, Volume 7220 of Lecture Notes in Computer Science, Springer Berlin / Heidelberg, 2012.
http://dx.doi.org/10.1007/978-3-642-31439-1_7
Fabula development has been funded by the MFG Stiftung Baden-Württemberg from November 2010 to October 2011.
Fabula on freecode:
http://freecode.com/projects/fabula