Message board on orafaq.net
- Unmoderated questions and answers.
- http://www.orafaq.com/forum/

ITToolbox - PL/SQL code exchange
- Public forum where programmers can submit, retrieve, and rate PL/SQL code fragments
- http://oracle.ittoolbox.com/code/archives.asp?i=10&t=430&a=t

Wikipedia: PL/SQL
- Encyclopedia article about the Oracle extension to SQL, including an overview of its functionality, data types, and constructs.
- http://en.wikipedia.org/wiki/PL/SQL

Oracle Larry Bot
- An artifical intelligent agent who can be queried for Oracle Error Messages. He is currently accessible via AOL IM.
- http://www.billboard.net/oraclelarrybot.htm

RevealNet PL/SQL Tips
- PL/SQL Tip of the Month and archives.
- http://www.revealnet.com/pipelines/plsql/tips.htm

High Speed PLSQL
- NOUG presentation on High Speed PLSQL Tuning by Rodger Lepinsky.
- http://home.earthlink.net/~rodger22/plsql.htm

PL/SQL tips
- Short tips and code fragments written (or collected) by Connor McDonald. Includes bit operations, undocumented features, and 8.1.7.
- http://www.oracledba.co.uk/tips_plsql.htm

mod_plsql
- An Apache module. It aims to provide Oracle Web Application Server 3.0 API compatible interface to Oracle RDBMS. Tested with Oracle8/8i.
- http://www.total-knowledge.com/progs/mod_plsql/

UC Davis - Tutorials
- Oracle SQL and PL/SQL tutorials from the UC Davis Database and Information Systems Group (DBIS)
- http://sirius.cs.ucdavis.edu/teaching/sqltutorial/

BNF Index of PL/SQL Version 2.1 for Oracle 7
- Backus-Naur Notation for PL/SQL 2.1 for Oracle 7. Old version, but still interesting.
- http://cui.unige.ch/db-research/Enseignement/analyseinfo/PLSQL21/BNFindex.html

Ixora Q & A
- Questions with answers by Steve Adams, expert on Oracle internals
- http://www.ixora.com.au/q+a/plsql.htm

mod_owa: Apache PL/SQL Gateway Module
- Open source Apache module allowing PL/SQL to generate dynamic web pages.
- http://www.sharemation.com/~dmcmahon/modowa.htm

FAQ by Frank Naudé
- Part of the so-called "underground" Oracle FAQ, this is a brief but useful list of PL/SQL questions & answers.
- http://www.orafaq.com/faqplsql.htm

Code Samples and Suggestions
- Over a dozen tips, tricks, and code samples, by Jonathan Lewis.
- http://www.jlcomp.demon.co.uk/ind_plsql.html

PLNet.org
- An open source, focused, common repository for PL/SQL developers. Intended to improve the day-to-day life of thousands of Oracle developers around the world.
- http://plnet.org/