FreeSQL
Provides novice users free MySQL and PostgreSQL databases with which they can learn SQL.

Htmldb-Hosting.com
Hosting for Oracle’s HTML DB which is an add on to the Oracle Database 10g.

HTMLDB.com
Oracle HTMLDB web application hosting with additional services based upon the fast and easy to use web-based development environment.

MySQL Database Hosting by BizHostNet
Offers free accounts for developers for online database programming with connection examples.

MySQL Hosting by Rackspace
Mysql hosting service by Rackpace and certified by MySQL AB.

Noname SQL
Hosting for MySQL databases.

Revion Solutions
Comprehensive Oracle database hosting solutions.