Ramper - Ramper is a free web3 SDK for DApps to onboard users quickly.
CoinList - Build a diverse portfolio of pre-launch token investments
dappKit - dappKit is an easy-to-use framework that builds the foundations required to interact with blockchain nodes.
Crypto Buyer's Guide - Extensive cryptocurrency buying guide
thirdweb - thirdweb is an ecosystem of SDKs, dev tools, and dashboards that help teams build and manage web3 apps. Deploy custom or pre-built contracts to ETH, MATIC, AVAX, & more.
CoinCap.io - Shows the prices of different cryptocurrencies from ShapeShift.