API List - A collective list of APIs. Build something.
Sheetsu - Turn Google Spreadsheet into API
Abstract APIs - Simple, powerful APIs for everyday dev tasks
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
Phantombuster - A marketplace of simple to use no-code APIs
grepQL - GraphQL IDE - Generates every queries from the schema