Oracle University - Online training, certification and resources.

Club Oracle - Membership-focused program putting people in touch with the products and services of Oracle.

ITtoolbox Portal for Oracle - Content, community, and service for Oracle professionals. Providing technical discussion, job postings, an integrated directory, news, and much more.

OracleZone - A user-driven community of help for Oracle's database products and tools.

Computer Mentors - Hints and tips, along with an Oracle forum.

Intelligent Enterprise - A guidebook focused on helping IT and business leaders collect, analyze, understand, and act decisively on enterprise business information.

Oracle Power - Tons of Oracle related resources.

OraDev - Portal for Oracle Developers with over 200 links to quality Oracle sites, and over 100 book descriptions.

OracleNotes.com - A community for Oracle Database Administrators.

Underground Oracle FAQs - Provides independent and useful information on Oracle products to the Oracle community.

The Oracle Resource Stop - Script Archive with a collection of hundreds of FREE SQL, PL/SQL, NT, JAVA, PERL and Unix shell scripts.

The Database Domain - Great resource for new database administrators.

Oracle Bookmark - A directory of sites containing oracle database development information, articles, tutorials, tips & tricks, guides and sample codes.

Oracle-Home.com - Software reviews, free downloads and books about Oracle Database development and administration.

Oracle Resources - A free portal from DBResources.com focused on Oracle Database Technologies.

Oracle-Resources - Database of Oracle jobs, recruiters, and resources.

OracleFans - Independent site with user forums and other useful info.