There is a correlation between a platform's market share and its number of development tools available.

However, quantity doesn't bring everything... Here's a short list of development environments for Symbian OS devices.

Product Author Language(s) Desktop Version Mobile Version Has IDE License Comment Symbian OS C++ SDK Symbian C++ Commercial Native language of Symbian OS. All non-privileged APIs are available. OPL Symbian Basic-like Freeware Rapid Application Development tool. MobileVB AppForge Visual Basic Commercial Direct integration into Microsoft Visual Basic. Allows for cross-platform development. Java Java Commercial PersonalJava, JavaPhone, MIDP