MySQL - The world's most popular open source database

NewRelic - New Relic is a Software Analytics company that makes sense of billions of metrics across millions of apps. We help the people who build modern software understand the stories their data is trying to tell them.

PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.

AppDynamics - Get real-time insight from your apps using Application Performance Management—how they’re being used, how they’re performing, where they need help.

SQLite - SQLite Home Page

AppSignal - We monitor the software that makes your customers happy.