Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Mongoku - A neat Web-based GUI for MongoDB
Sheetsu - Turn Google Spreadsheet into API
DBngin - Free all-in-one database version management tool 🛠️
Magic Spreadsheet - Human workforce and AI plugged into your Google Spreadsheets
MongoLab - MongoLab is a fully managed MongoDB Database-as-a-Service platform that automates the operational aspects of running MongoDB in the cloud.