Originally Posted by coxswain
I program in C & C++. I would need to go for cross platform development in future. May be, I would need to rely on platforms like QT for that. Any way thanks pixellany and i92guboj for the quick replies.
For C++ I'd choose qt4 right now.
To gain skill level there's only one path: once you have chosen a language and a basic development toolkit all you need is to program a lot to become proficient with it.
If you need IDEs similar to these found in Windows, you should check eclipse, anjuta, netbeans... I think that at least eclipse and netbeans will work the same under Windows. I know nothing about Symbian.