Developer Tools

Benthic Software
PLEdit: a PL/SQL editor, one of several Oracle tools. [Commercial]
http://www.benthicsoftware.com/products.htm

ClearSQL by Nordic Tree Software
A tool for formatting PL/SQL source code and reviewing it for deficiencies in the areas of readability, program structure, maintainability and correctness. It catches over 40 common coding mistakes and gives suggestion as to coding best practice. ClearSQL can be used to do a quick syntax check on code without sending code to the server. [Shareware]
http://www.clearsql.com/

DreamCoder for Oracle
PL/SQL development environment that includes a debugger. Several editions available; high-end edition includes a code generator. By Mentat Technologies. [Commercial]
http://www.sqldeveloper.net/oracle-manager-developer/dreamcoder-for-oracle.html

Embarcadero Technologies
Development environment for SQL and PL/SQL, with optional debugger and profiler. Includes tools for Transact-SQL, Java, HTML. [Commercial]
http://www.embarcadero.com/

Isidian SQL Insight
A tool that enables users of an Oracle database to easily create and optimize their SQL code for application development, administration, or ad-hoc reporting. [Commercial]
http://www.isidian.com/products/sqlinsight/

Log 4 pl/sql
Generic tool for logging, benchmarking, and monitoring custom PL/SQL code, inspired by "log4j" [Open source, GPL]
http://log4plsql.sourceforge.net/

Material Dreams
PL/SQL trace tool, table exporter, session manager, shared pool profiler, and other tools. [Commercial]
http://www.materialdreams.com/oracle/products.html

Oracle Developer Suite
Includes various PL/SQL code generators in "Designer" component, also PL/SQL Procedure Builder [Commercial]
http://www.oracle.com/ip/develop/ids/

OraTools
Execute, test, and debug SQL and PL/SQL statements. By Core Lab. [Commercial]
http://crlab.com/oratools/

pldoc
Open source utility, analogous to javadoc, that generates PL/SQL code documentation in HTML. [Open source, LGPL]
http://pldoc.sourceforge.net/

Pl/Pdf
Generate dynamic PDF documents from data stored in Oracle databases using the PL/PDF program package. [Commercial]
http://www.plpdf.com/

PL/SQL Developer
Single product that includes editor, and debugger. By Allround Automations. [Commercial]
http://www.allroundautomations.nl/plsqldev.html

Pl/Sql tidy
Allows the user to tidy and format PL-SQL code in a batch file or DOS prompt. [Freeware]
http://psti.equinoxbase.com/

SQLGrid
An interactive query tool for Oracle developers. This is a SQL Worksheet replacement with a host of additional commands. SQLGrid provides a way to execute arbitrary SQL or PL/SQL code and also investigate how it is execute and its resource consumption. By Information Construction Company.
http://iccnet.50megs.com/Products/SQLGrid/SQLGrid.htm

SQL-Programmer
Cross-platform database aqpplication development environment, formerly sold by Sylvain Faust Software. By BMC Software. [Commercial and free versions]
http://www.bmc.com/products/proddocview/0,,19052_0_0_7796,00.html

SQLTools
A light weight and robust tool for Oracle database development. It includes a text editor, SQL console and utilities. [Freeware]
http://www.sqltools.net/sqltools.html

SwisSQL
Oracle to Java edition helps convert Oracle PL/SQL procedures to Java. By Vembu Technologies. [Commercial]
http://www.swissql.com/

TOra - Toolkit For Oracle
Including browser, PL/SQL editor, and debugger for Linux or Windows. By Underscore AB. [Open source and commercial versions]
http://tora.sourceforge.net/