SpreadSimple - A blazing-fast way to create and manage sites using Google Spreadsheets
Sheetsu - Turn Google Spreadsheet into API
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
Sheetson - Instantly turn any Google Sheet into RESTful API
SheetAside - Access your Google Sheets from where you are
Sheet 2 Site - Generate a website from 📗 Google Sheets