From Forum Nokia Wiki

The following tools may be part of the extended tool chain for Symbian OS application development:

Windows

• Command prompt (cmd.exe)
• System environment

IDEs

• CodeWarrior
• Borland Mobile Studio
• Carbide

C/C++ Compilers

• gcc
• gcce
• CodeWarrior C/C++ Compiler
• Microsoft C++ Compiler
• RealView Compilation Tools (RVCT)

Symbian specific tools

• bldmake
• abld
• petran
• elftran
• makesis
• signsis
• createsis
• devices
• makekeys

Nokia tools

• Nokia Connectivity Framework
• Nokia Mobile Internet Toolkit

Other

• makefile
• ActivePerl
• Java Runtime Environment (JRE)