I need a free 3D software, which is possible to have forever, and which you can import the things you make into Flash with. Any suggestions?

Swift 3D imports into Flash. And I think 3D Studio Max does as well.

Blender is the only free one I know of but doesn't import into Flash.

Spazz: Thanks for those, I'm having some problems with Swift 3D so I'll try Studio 3D Max.

James: Thanks for the tips.

Quote from James Moer

I suggest you master 2D before attempting 3D

Besides your 3D things will look much better, practice easing and drawing.

you dont have to master 2d, you can just go ahead an learn 3d, because its way different then 2d, you dont use your pencil to draw, you model something.

there's also anim8or. its like 1 mb and free. but if you want quality stuff i'd dowload blender for free.

edit: yes you could try 3d's max, imo its the easiest quality modeling program to learn. if you need help add me on my msn ;) glennh1991 AT hotmail DOT com it's not free tho :)

A very good free 3d modeller would be Blender.
It has been used professionally in movies, like Spiderman 3.

Quote from Doomdooer

A very good free 3d modeller would be Blender.
It has been used professionally in movies, like Spiderman 3.

it was not used for the finished product tho :) and i think it was spiderman 2

My bad, Spiderman 2.
And yes, it was used for Storyboarding and pre animatics.

Quote from Wikipedia

Blender has a comparable depth and breadth of features compared to commercial, proprietary, high end and mid range 3D software.

Here is a comparison of the top 3-D programs today. You'll see that Blender is indeed a force to be reckoned with.
http://wiki.cgsociety.org/index.php/Comparison_of_3d_tools

There's a free student's version of Maya. Not sure if it imports into flash though.

It also displays an annoying watermark if you render anything.
Plus, it's not a student version. It's a trial version.

There's also a trial of Cinema 4d, but it won't let you render anything.