OpenViBE is an open source software environment “enclosing novel and efficient techniques for Brain-Computer Interfaces, Neurofeedback and Virtual Reality”. I haven’t downloaded and run it, but it looks like it takes EEG data and renders a 3D image of activity in your brain so that you can use this for neurofeedback. Could be fun in conjunction with the build-your-own-EEG projects that we mentioned recently here.
Paper: C. Arrouet, M. Congedo, J.E. Marvie, F. Lamarche, A. Lécuyer, and B. Arnaldi. Open-ViBE: a 3D Platform for Real-Time Neuroscience. Journal of Neurotherapy, Vol. 9, Num. 1, 2005
Looks they were recently looking for a postdoc to continue work on this. I dunno if that job is still open or not.