Arbiter IDE - The offline-friendly, in-browser IDE for pure JS prototypes
Redsmin - All-in-One GUI for Redis. Thightly crafted developer oriented, online real-time monitoring and administration service for Redis.
Deco IDE - Best IDE for building React Native apps
usql - Universal command-line interface for SQL databases
grepQL - GraphQL IDE - Generates every queries from the schema
Errbit - The open source error catcher that's Airbrake API compliant