1. ZK-Sync! This network has yet to develop, and we are still early! Do activities, build projects, help develop.

   https://ecosystem.zksync.io/

2. Scroll - I don't know why so little is said about Scroll, although it is also a great solution for zkEVM Scaling!

   https://scroll.io/

3. Arbitrum - https://arbitrum.foundation (check the ecosystem section, there's a lot of interesting stuff)

4. Optimism - the optimism team still has a lot of money left over for the community. It's a great opportunity to support their project, do something with it, and build something

   https://www.optimism.io/apps/all

5. Starknet has a long way to go, so here we are also early! I advise you to study their ecosystem

   https://starkware.co/starkex-ecosystem/

Don't forget to do other activities (like Philand, Layer3, TheCrew, DegenScore, etc.), do other activities, and don't get hung up on just airdrops. Be a builder, be a tester, be an active user! GL HF!