poll.ly - your perfect partner to gather ideas and opinions in real time
LibreOffice - Base - Base, database, database frontend, LibreOffice, ODF, Open Standards, SQL, ODBC
PollUnit - Create and customize public or anonymous votings, surveys, free tables, idea collections or audio, video and photo contests.
My Visual Database - Using My Visual Database, you can create databases for invoicing, inventory, CRM, or any specific purpose.
Fast Poll - Create instant, real-time polls for free
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.