Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.

CoinMarketCap - Crypto-currency market capitalizations.

Dune Analytics - 675 million+ members | Manage your professional identity. Build and engage with your professional network. Access knowledge, insights and opportunities.

CryptoCompare - We bring you all the latest streaming pricing data in the world of cryptocurrencies.

Unidata - We all know that it is not that easy for web3 developers(especially for front-end) to access and present Web3 data due to the infrastructure design of blockchains.

Coinranking.com - A mobile-friendly list of cryptocurrencies.