What are the languages needed to develop mobile software,be it in symbian platform or maemos or others.?

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please give me details so that i can learn developing mobile softwares.Also inform if there’s any tutorial available online for it.

You have many options but also many sources of info:
- for Nokia platforms: Symbian C++, standard C/C++, Java (J2ME), Flash, Python, HTML and Java Script. See http://developer.nokia.com
- for Android: Java, standard c/c++ – See http://developer.android.com
- for iPhone: Objective C, HTML and Java Script. See http://developer.apple.com