See "Where to find additional useful scripts" for a listing of some of my favorite resources for scripts.
I'm confused by the "Like Cubes, Cylinders, Etc." part of your message. You specifically want to use scripts to make cubes and cylinders? Whatever the case, you can probably find what you're looking for with the After Effects Community Help search. For example, this search for 'script cube' pulls up several useful results that provide links to projects and scripts for making 3D cubes in After Effects.
> Funny, that the most obvious solution doesn't come up first in your search
That's because my search invloved the word 'script', which isn't a key word on your site. If I just search for 'cube', your site comes up in the top 10.
That's why I was asking Phillip if he was really intent on finding scripts, per se. That might be a red herring, if all that he's looking to do is make or find cubes and cylinders and such.