Herman Miller Aeron - The iconic office chair, remastered

You Borrowed It - Keep track of who borrowed what and when you can expect it back

BAGOBAGO Backpack Chair - Sit down anywhere on your backpack

LendList - Never again forget what you borrowed from someone and keep track of what your friends borrowed from you (Android app). - raphaelm/lendlist

SitTight - Get fit while you sit. Balanced active sitting chair

Outdoorsy - Find the best RV rental