Hi Rhtsg, just to clarify,
1) are you looking for somebody to implement such an app? if thats the case, maybe it'd be a good idea to title the message with 'job offer' or something similar.
2) you're planning to do something like that yourself, but need some help? In this latter case, usually what people would do is to design the BCI/EEG signal processing part with OpenViBE Designer while getting data from the acquisition server, the end-user application itself being outside openvibe (e.g. implemented with unity, unreal, ogre, opengl, or whatever), and decide a communication channel between the two, for example VRPN, LSL or very simple TCP/IP. If an event timeline is needed in your setting, this can be generated by the app and passed to openvibe with the said communication if needed. The openvibe documentation page http://openvibe.inria.fr/documentation-index/
should be of use, especially the section about 'connecting openvibe and other applications'.