Free molecule editor under Linux

[Anselm Horn <Anselm.Horn %! at !% Organik.Uni-Erlangen.DE>]

Dear CCLers,
 I am looking for a free 3D-molecule editor/builder (not just viewer)
 under Linux/Unix.
 Input should be mouse-and-click-orientated (not just visualized
 Z-matrix-input),
 and ideally it should run without any additional installation effords
 (i.e. statically linked; C/C++/[Java]).
 At the moment, I am only aware of Pymol and GDIS.
 Are there any established alternatives ?
 My motivation is to offer our Windows-trained students some familiar
 input facility and visualization tool...
 I'll summarize the answers.
 Regards,
 Anselm
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 _______________________________________________________________________
 Anselm Horn, Dipl. Chem. Univ.          Anselm.Horn %! at !% ccc.uni-erlangen.de
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