Redsmin - All-in-One GUI for Redis. Thightly crafted developer oriented, online real-time monitoring and administration service for Redis.
PgHero - Rails database insights made easy. Add the gem, get a dashboard with long running queries, cache hit rate, and more.
usql - Universal command-line interface for SQL databases
pganalyze - PostgreSQL performance monitoring installed within minutes
Errbit - The open source error catcher that's Airbrake API compliant
Postgres Monitor - A better way to monitor and debug your Postgres database. Real-time health dashboards, query insights, dynamic recommendations and more.