Outdoorsy - Find the best RV rental
LendList - Never again forget what you borrowed from someone and keep track of what your friends borrowed from you (Android app). - raphaelm/lendlist
thangs - thangs simplifies and encourages the lending and borrowing of everyday objects.
Rep The Squad - For fans who go further.
LendPal - Fast And Reliable Working Capital
iLend - Keep track of the things you lend and borrow.