You can find list of airdrops for LUNA stakers and holders below. Most LUNA airdrops work on a snapshot basis, where you simply have to hold or stake your LUNA coins in a private wallet to be eligible. Check out one of the drops below to see how to claim your holder airdrop.
LUNA will be doing an airdrop of their new coin to old LUNA holders. The old coin will be called LUNA classic and the new one will be called LUNA. For more info, see this page.