AViz homepage: http://phycomp.technion.ac.il/~aviz/

current version is 6.1 although it says 5.6 on the prompt.
Sourcecode at: http://phelafel.technion.ac.il/~peledan/
Instructions  at: http://phelafel.technion.ac.il/~peledan/AViz_6.1_Compilation_and_Run_instructions.txt
We have it running also on redhat, AViz 6.0 instructions at: http://phycomp.technion.ac.il/~newaviz/install.html

Usage tutorial at:
http://phycomp.technion.ac.il/~phr76ja/viztut/talkindex.html

downloadable sample .xyz file at:
http://phycomp.technion.ac.il/~phr76ja/viztut/satdem1_5.html
but the link there to binaries are to the old ones.

If using in publication please cite:
D. Peled, A. Silverman and J. Adler ``3D visualization of atomistic simulations on every desktop',  IOP Conference Series, (2013) 454, p. 012076.