InfluxData - Scalable datastore for metrics, events, and real-time analytics.
Veezoo - Ask Natural Language questions against your SQL Database
TimescaleDB - TimescaleDB is a time-series SQL database providing fast analytics, scalability, with automated data management on a proven storage engine.
SQL School - Data analysts training data analysts
Prometheus - An open-source systems monitoring and alerting toolkit.
Arctype - Free SQL Client for developers and teams. Available for Mac, Windows, Linux, and Web.