A gentleman named Tony Koyu designed the Tani Lipi script in 2001 for the Tani group of languages in the far northeast of India. It is explicitly designed to unify the many Tani tribes. There is pretty fierce debate over whether this writing system is a good thing or a bad thing.
There is very little information available about Tani Lipi. I can’t even figure out if it is a syllabic alphabet or an abugida, alas.
Links: Unicode introduction