MySQL - The world's most popular open source database
Bitcoin - Bitcoin is an innovative payment network and a new kind of money.
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
Litecoin - Litecoin is a peer-to-peer Internet currency that enables instant payments to anyone in the world.
SQLite - SQLite Home Page
Monero - Monero is a secure, private, untraceable currency. It is open-source and freely available to all.