Focus on the data, not the database. Induction is a new kind of tool designed for understanding and communicating relationships in data. Explore rows and columns, query to get exactly what you want, and visualize that data in powerful ways.

dbdsgnr is an html5 web app which allows you to design your database schema without writing sql.
You can design your database schema just like creating a UML diagram.

Xeround is an elastic, always-on database that lets you
run your existing MySQL-based application in the cloud.

The book is designed to guide you gently through using CouchDB with clear but practical scenarios.

Adminer (formerly phpMinAdmin) is a full-featured MySQL management tool written in PHP. Conversely to phpMyAdmin, it consist of a single file ready to deploy to the target server.

A lightweight database abstraction layer suitable for high-load websites where you need the scalable advantages of connection pooling. Written in C for speed, DBSlayer talks to clients via JSON over HTTP, meaning it's simple to monitor and can swiftly interoperate with any web framework you choose.

More lightweight and feel much better than the big phpMyAdmin.