Hugh science directory with more than 100000 listed science related websites from around the world. Submissions for science related authority sites are free.

If you want to learn how to speak Spanish at home, you know it can be a challenge. Rocket Spanish is designed to have you speaking Spanish online at home quickly and easily.

DATWiki.net is the most comprehensive source of flight terms and imagery on the web. Based on the Dictionary of Aeronotical Terms, compiled and edited by Dale Crane, DATWiki provides access to over 10,000 terms and 500 images. These terms have been assembled from the Pilot/Controller Glossary, from AIM, and glossaries from government handbooks and manuals. DATWiki also provides definitions not found in government publications.