Arbiter IDE - The offline-friendly, in-browser IDE for pure JS prototypes
Sheetsu - Turn Google Spreadsheet into API
Deco IDE - Best IDE for building React Native apps
Sheety - Turn any Google sheet into an API instantly, for free. Power websites, apps, or whatever you like, all from a spreadsheet. Changes to your spreadsheet update your API in realtime. Neat
grepQL - GraphQL IDE - Generates every queries from the schema
Abstra Dashes - Deploy custom tools in days, not sprints