Avogadro - Avogadro is a free, fantastically easy to use molecule editor.
BKchem - BKChem is a free (as in free software :o) chemical drawing program.
Jmol - Jmol is a free, open source molecule viewer for students, educators, and researchers in chemistry...
GPeriodic - GPeriodic is a periodic table application for Linux.
UCSF Chimera - UCSF Chimera is a highly extensible program for interactive visualization and analysis of molecular...
Rasmol - RasMol. 96 likes. RasMol is a computer program written for molecular graphics visualization intended and used mainly to depict and explore biological...