Mesh-Editor

Hi, I tried to make my own Mesh Editor but it's to hard for me, nevertheless I want to make my own meshes. Now I need a free mesh-editor which is able to export them in a format which I am able to load into OpenGL like 3ds-files... Is there a free one or does all these programs cost money ? Hmmm.. I thought about it, forget what I have said I just try it again.. Does anyone know good tutorials on CSG? [edited by - Kaesebrot on May 29, 2002 10:53:22 AM] [edited by - Kaesebrot on May 29, 2002 10:55:17 AM]