Check out this website, which has lots of information about third-party (non-NASA, non-US government) evidence of the Apollo missions to the Moon.
http://en.wikipedia.org/wiki/Third-party_evidence_for_Apollo_Moon_landings
Key evidence: dating of Moon rocks (via hundreds of independent experiments) puts then 200 million years older than any rocks ever found on Earth; and independent data received from laser light fired at reflectors on the Moon - reflectors that must have been placed there by astronauts.