There are two different lists below. While all NFTs in the first list are free on mainnet, the ones in the second list are already on testnet networks.
So, we are going to try to improve our on-chain metrics for the projects that have big airdrop potential.

1. Free NFT mints on mainnet

We can interact with one more different contract on the chains below to increase our chances for potential airdrops. These mints include only transaction fees on their chains.
zkSync Era:
https://green-flowers-traveler.nfts2.me/
Linea:
https://bear-traveler.nfts2.me/
Scroll:
https://proxxy-by-xx.nfts2.me/
https://lizboon.nfts2.me/
Polygon zkEVM:
https://rabbit-traveler.nfts2.me/
Base:
https://yellow-flowers-traveler.nfts2.me/
Manta Pacific:
https://blue-flowers-traveler.nfts2.me/
opBNB:
https://purple-flowers-traveler.nfts2.me/
Zora:
ProXXy Traveler NFT on Zora
Public Goods Network (PGN):
https://red-rose-traveler.nfts2.me/

2. Free NFT mints on testnet have big potentials

These networks are on testnet. So, we need only test tokens to mint.
Taiko:
https://orange-traveler.testnet.nfts2.me/
https://cat-ai-traveler.testnet.nfts2.me/
Frame:
https://carrot-traveler.testnet.nfts2.me/
Zetachain:
https://zeta-traveler.testnet.nfts2.me/
That’s all for now.
Block Traveler HOPP — Link in Bio

Note: Always minting free NFTs may be considered a Sybil action by project teams, so minting a few NFTs for a fee on the networks may be useful. It is up to you. In order to mint more NFTs for a small fee or for free and to earn a commission discount for all transactions you make on crypto currency exchanges, you can click here.

Important Notice: This material is not meant to address your specific needs; it is only for your general use and knowledge. In particular, the information does not constitute any form of advice or recommendation. Appropriate independent advice should be obtained before making any such decision.