Awesome

Punchkeyboard

Punchkeyboard is an open-source keyboard for virtual reality, enhanced with autocomplete and next word prediction functionality for a swift typing experience. It was created with Unity and written in C#. The built in prediction is based on Reddit conversation corpus, however the repository contains functionality for creating custom dictionaries for personalised suggestions as well.

You can read more about the project here: http://bit.ly/Punchkeyboard