DataNitro - DataNitro enables users to automate Excel with Python and also to turn a spreadsheet into a database GUI - or a web server backend.
Publisheet - Publish your Excel sheets to the web as dynamic web applications with formula support.
Sheetbase - Free, fast and fun way to build modern websites and apps 🛠️
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.
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
SpreadsheetConverter.com - Use online spreadsheets, smart forms and beautiful charts in your blog or website. Put your booking and order forms online. Show live charts. Change any cell and the online spreadsheet or live chart immediately updates itself.