This is WikipediaVision that shows you a Google map that displays in real time who is writing/editing what Wikipedia entry across the globe. Really, really, really cool!
This is Veropedia. It describes itself as:
"Veropedia is a collaborative effort by a group of Wikipedians to collect the best of Wikipedia's content, clean it up, vet it, and save it for all time. These articles are stable and cannot be edited, The result is a quality stable version that can be trusted by students, teachers, and anyone else who is looking for top-notch, reliable information."