From Forum Nokia Wiki

Carbide is a mobile development tools family from Nokia. Carbide is a move to unify Nokia's mobile development tools into a common framework. It supports multiple platforms and multiple languages.

The Carbide tools family includes a number of IDE plugins.

• Carbide.c++ for Symbian Development
  • Carbide.c++ Developer Edition
  • Carbide.c++ Professional
  • Carbide.c++ OEM

• Carbide.ui for User Interface Customization in Nokia Series 40 and S60