Fluidkeys fetches verified public keys automatically.
When you install and set up Fluidkeys, you're asked for your email address. Once you've verified it, others can send you secrets. You don't need to manually exchange public keys.
Fluidkeys automatically fetches keys based on the verified email address and encrypts the secret to the key.
CryptoMarketPlot is an ad-free alternative to CoinMarketCap for the privacy-conscious crypto trader/developer. Check out their FAQ for an entertaining rundown of why they made the design choices they did, their coin inclusion criteria, how to use their APIs, and why they specialise in privacy / security.
A blockchain bulk search engine, useful primarily for retrieving transaction details across different blockchains. We couldn't turn it into a viable business and are focusing on a new app - a universal block explorer. TxBatch will stay free going forward.