Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Flatfile - The new standard for data import
FriendlyData - Communicate with databases like a human
Backand - Backand is a backend-as-a-service for AngularJS that provides out-of-the-box social login, push notifications, Ionic integration and more.
SpreadsheetDB - A database that you can query with spreadsheets
csvbox - Spreadsheet importer for your web app, SaaS or API