Mobile Application Development

Symbian Mobiles: http://library.forum.nokia.com/index.jsp?topic=/S60_5th_Edition_Cpp_Developers_Library/GUID-35228542-8C95-4849-A73F-2B4F082F0C44/sdk/doc_source/ToolsAndUtilities94/ToolsList.html

Windows Mobiles: http://msdn.microsoft.com/hi-in/library/bb158532(en-us).aspx

Google Mobiles: http://developer.android.com/guide/basics/what-is-android.html

Java Mobiles: Google search on J2ME.