CALCONIC_ - Build & add interactive calculators to your website! Choose from more than 50 premade calculators or build your own from scratch. No coding required. Free plan available. Zapier Integration. Publish Anywhere.
Dashblock - Turn any website into an API
ConvertCalculator - Create powerful, beautiful Calculator forms
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
uCalc - uCalc is a universal builder of forms and calculators.
Postman - The Collaboration Platform for API Development