Gravity airdrops for free

https://chainalert.me/airdrop/list/67f2a8

Recent projects that have airdropped for free include:

bless:

https://gostake.io/airdrops/bless

nodepay:

https://gostake.io/airdrops/nodepay

DAWN

https://gostake.io/airdrops/dawn

There are many more. Here, the ones with 0$ USD mean no cost:

https://chainalert.me/airdrop/