Heroku Postgres - Heroku Postgres is an SQL database as a service.
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
SolarWinds Database Performance Analyzer - SolarWinds Database Performance Analyzer analyzes SQL Server database to pinpoint the root cause of poor performance.
MySQL - The world's most popular open source database
ClusterControl - Control Your Database Infrastructure
Amazon RDS - Easy to manage relational databases optimized for total cost of ownership.