Software Uploading Problem

Hi friends,
I have bought the AVR Development board,
But AVR Studio software is not installing in my system,
Can anyone say me which software can be useful to work on the AVR Development Board other than the AVR Studio software and its version and its specifications.

I have ATmega16A IC.
Can Anyone explain How to download and install any software(Other than AVR Studio).
and How to run,upload and compile the program Plzzzzzzzzzzzzz step by step.
Its Very urgent