EOS Airdrop will take place on April 15 at the end of EOS Crowdsale. If you hold more than 100 EOS token in myetherwallet or ERC 20 compatible wallet, for every 1 EOS token you will have 1 eosDAC token, the airdrop is automatically to your mew wallet. But if you have less then 100 token, you will not receive the eosDAC token automatically on April 15, you will be eligible to apply eosDAC until May 15 to apply for the eosDAC token.
Oyster Pearl free airdrops will be on April 6. For every one Oyster Pearl (PRL) token, you will receive one Oyster Shell token (SHL). Oyster Shell pays users to to store files in decentralized anonymous manner. website users enjoy the ad free browsing experiences. Aelf is the decentralized cloud computing. To get free aelf token, you can follow aelf in twitters or join the telegram group.
Aelf Free Airdrop
https://candy.aelf.io/account/register?invitationCode=0M2R0AfFfR7B
EOS Airdrop
https://eosdac.io/tokens/