usql - Universal command-line interface for SQL databases

Open PostgreSQL Monitoring - Oversee and Manage Your PostgreSQL Servers

Rollbar - Rollbar collects errors that happen in your application, notifies you, and analyzes them so you can debug and fix them. Ruby, Python, PHP, Node.js, JavaScript, and Flash libraries available.

DBeaver - DBeaver - Universal Database Manager and SQL Client.

Opbeat - Application monitoring for developers

Apache Drill - Schema-Free SQL Query Engine for Hadoop and NoSQL