Well, I see that most of you are confused on what type of program im looking for... let me get some questions straighted out first...
First and foremost, like again, i want to thank everyone who took the time to search or post some intresting programs..
Second of all, im not an expert scientist lol... im in grade 11 chemistry, and were studying molecules.... for example... building a glucose structure...
Just taking a couple of carbon like pieces, and joining them with bonds, attached to other elements, etc.... Its really simple, and im sure most of you have done it in high school... i find it kinda fun.... Anyway, I just had the test today... we were asked to build a bunch of molecules(like fat, fatty acid, protein internal structure... stuff like that... well we got it back and i got 100%
!!! Thanks for your help again.
Another Edit: I also found another intresting program... check it out if your intrested....
http://www.download.com/Molecule-Constructor/3000-2051_4-10124264.html?tag=lst-0-1
EDIT: Majin_You, thank for the program!!! Its brilliant!!!