Wanted: simple MD trajectory viewer for reasonable sized systems

[Alex Ninaber <anina01' at \`iona.cryst.bbk.ac.uk>]

 Hi all,
 I am trying to find a free and simple MD trajectory viewer for
 Linux/xwindows with source. It does not have to be specifically
 for biomolecular structures, as long if I can view a trajectory
 of moving dots with bonds. I have tried VMD, and basically
 I think it is way too slow compared with a single frame viewer
 as Rasmol (to say it in other words: it can be done much faster).
 I would be happy with sources of any graphical primitives
 as well, so I can build the viewer myself. If there is any interest in
 these kind of programs, I'll maybe put some more effort in it.
 Alex Ninaber