[nik]

Hi,

 I need a software (I prefer free softwares) for visualizing orbitals, would you please help me?

[LQ43]

This has a demo version that is free for a high school or first year level http://www.wavefun.com/products/demo_odyssey.html

or if you are second year or higher choose the Spartan/Trident version http://www.wavefun.com/products/demo.html

note they have limited time activation and require some personal info but might do for what you need

[mf]

would you mind introduce me more advanced softwares? I mean softwares suitable for higher years of university.