Have I missed something here?
Some interesting links:
Open Source Assistive Technology Software: http://www.oatsoft.org/
A collection of 5000 pictograms, necessary for an AAC application, licensed under CC-BY-NC-SA: http://www.oatsoft.org/Software/arasaac-pictograms/
pVoice, open source Augmentative and Alternative Communication: http://www.oatsoft.org/Software/pvoice
I wondered about that, although I am not a programmer. Thanks for the pictogram reference!
Please base the project outside the US, and build it for Android/Linux!