MuniRent is a marketplace for rentals between municipalities, based in Ann Arbor.
In the news
http://www.mlive.com/business/ann-arbor/index.ssf/2014/07/code_for_america_picks_ann_arb.html
http://techcrunch.com/2014/07/10/code-for-america-announces-five-companies-for-accelerator-program/