Best for quick low-level molecular modeling. You must register with the vender to download this free product. Go here for some Chime Viewer Basics
Best for viewing high-level molecular modeling. Chem3d Net Plugin
Many other free programs are available here.
ISIS/Draw enables you to electronically draw and insert molecular structures into documents, Web pages, spreadsheets, and presentations. It has a feature that will automatically name compounds you draw.
QuickTime plug-in for viewing movies.
RasMol is a stand alone molecular modeling program for analyzing macromolecules. The program has a command line interface, with several menu options.
ViewerLite is a stand alone molecular modeling program for analyzing molecules. The programs is menu driven.
Shockwave is for viewing presentations.
Cosmo Player is for viewing animations.
VRML Viewing and several tools for 3D viewing.
For reading Adobe Acrobat documents (.pdf files).
Java 1.4 for
running Java programs programs.