There seems to be a shortage of good Oracle websites, perhaps taking a lead from Oracle’s own poor effort. Nevertheless, here are a few to get you started:

Oracle

Ill-organised, full of marketing-speak, prone to mysterious 404 errors, most useful content hidden behind (free) registration, there’s a lot not to like about this site. Still, it is the primary source for information about the Oracle database, good luck finding it.

Ask Tom

Technical question-and-answer series from in-house Oracle expert Tom Kyte. Sadly, he seems to have stopped answering questions in 2003, but there’s still a lot of useful tips to be found there.

Oracle FAQ

Another collection of questions and answers accumulated over several years. Some sections, the Forms one for example, don’t seem to have been added to for a long time. Others are more useful.

OracleDBA.co.uk

Yet more Oracle tips! This one’s a collection of snippets by Connor McDonald, useful to developer and DBA alike.

Oracle Developer

Another independently produced collection of Oracle stuff, by another Oracle contractor Adrian Billington.

Toad

Quest Software’s excellent development tool for Oracle puts a GUI front end on all sorts of database creation, maintenance and querying tasks as well as providing a rich editor for coding in. Not cheap, but worth every penny.

Steven Feuerstein

Writer of the best-selling Oracle PL/SQL Programming, This is Steven’s personal site. Links to a few PL/SQL programming goodies as well as some of the author’s left-leaning political causes.

Tek-Tips Forums

Not an exclusively Oracle site, but a forum for getting technical questions answered in a wide range of fields. You are expected to answer some questions yourself if you want to use this forum long-term. Be warned, it can become quite addictive…