Jmol

Jmol is a free, open source molecule viewer for students, educators, and researchers in chemistry and biochemistry.

• Cross-platform, running on Windows, OS X, and Linux/Unix systems.
• The JmolApplet is a Web browser applet that can be integrated into Web pages.
• The Jmol application is a standalone Java application that runs on the desktop.
• The JmolViewer is a development tool kit that can be integrated into other Java applications.

New features:

• Turns an array of hashes into a hash of arrays of hashes
• Like a pivot table for an array, but based on the value of a hash
• key within each hash element of the array, not the element itself
• Returns a (hash-of-arrays-of-hashes) of the array elements grouped
• by the stringified values of the specified key.
• Full release notes are available here