MySQL - The world's most popular open source database
Coinwink - Crypto alerts, watchlist and portfolio tracking app for Bitcoin, Ethereum, and other 3500+ crypto coins and tokens
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
CoinMarketCal - All crypto events that help crypto traders at one place
SQLite - SQLite Home Page
Cryptorch API - Cryptorch API is an AI-powered machine learning utility that is used in forecasting the prices for various cryptocurrencies from Bitcoin to BitTorrent.