The Webtask Editor is a web based editor (and soon an Electron desktop app) to create and edit webtasks. This started as a side project but it quickly became clear that the editor would help adopt the serverless concept webtask Our goal is to reduce the time it takes to go from an idea => code => HTTPS endpoint.
One of the tools many of us enjoyed using a lot in the old days was the SQL Explorer. The instant feedback you've got when executing queries was great. Edit your query, CTRL+R, see the result, teak the query, CTRL+R, and repeat that loop until you got it right.