There are two ongoing and very interesting airdrops I have been taking part. DeepOnion and PoSToken.
Deeponion is more established where dev team has shown tons of development, huge community and a great concept, big exchanges are still to come as they are part of the roadmap. Currently in the week round number 15 and still 25 more weeks to go.
PosToken is in its earlier stages and in the third airdrop round and as you can see by their very automatized airdrop platform they are very commited to the project and also roadmap and whitepaper looks great.
Both projects have more engaged teams and communities than many ICOs I have been part of.