SQL Fiddle : A tool for easy online testing and sharing of database problems and their solutions.
Doodle : Doodle radically simplifies the process of scheduling events, whether they’re board or team meetings, dinners with friends, reunions, weekend trips, o...
Feed43 : Your favorite site doesn't provide news feeds?
This free online service converts any web page to an RSS feed on the fly.
Mockingbird : Mockingbird is an online tool that makes it easy for you to create, link together, preview, and share mockups of your website or application.