The Peacekeeper App: Become a Force for Good in Your Neighborhood
Learn more and support Peacekeeper
http://indiegogo.com/projects/peacekeeper
RELATED
The Voluntary City: Choice, Community and Civil Society edited by David Beito, Peter Gordon & Alexander Tabarrok at Google Books
http://books.google.com/books?id=UNL8CypId5IC&printsec=frontcover&dq=The+Voluntary+City&hl=en&ei=KIl8TfwJgYqtAd-z3YwG&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCkQ6AEwAA#v=onepage&q&f=false
Smartphone Apps
http://copblock.org/apps