About.com on Oracle
   Provides feature articles, net links, lively forum discussions and a chat room.
   http://databases.about.com/od/oracle/Oracle_Databases.htm

Ask Tom
   Tom answers questions, with a searchable archive of answers.
   http://asktom.oracle.com/

DBAzine
   Technical articles covering database management and administration, from a variety of authors.
   http://www.dbazine.com/oracle

Lazydba.com
   Oracle DBA listserve. Archive of past discussions.
   http://www.lazydba.com

Oracle XE (Express Edition)
   Free to develop, deploy, and distribute.
   http://www.oracle.com/technology/products/database/xe/index.html

Oracle: TimesTen In-Memory Database
   Database stored in physical RAM for applications requiring high speed throughput. Includes product datasheets and case studies.
   http://www.oracle.com/database/timesten.html

Wikipedia: Oracle Database
   Encyclopedia article providing an overview and history of the company's database product.
   http://en.wikipedia.org/wiki/Oracle_database

ixora
   Unix and Oracle, advice, scripts and training by Steve Adams.
   http://www.ixora.com.au/