Sites

Electronic Periodic Table of the Elements (Popularity: )
http://www.toddmiller.com/epte/index.html
Text-based periodic table for Unix. The source code, written in C, is available for download and use under the GNU GPL. It includes sound files that give element names and ...

BK Periodic Library (Popularity: )
http://www.orbit.org/perlib/
Windows periodic table with element properties search and graphing. Free for personal use.

Periodic Spiral of the Elements (Popularity: )
http://www.periodicspiral.com
For Mac and PC, an alternative representation of the periodic table that aims to better place the lanthanoids, actinoids, and hydrogen. The program also includes extensive information about elements, their ...

Celeste (Popularity: )
http://www.chemlearn.com
An interactive periodic table software product for Windows with graphing capabilities.

Synergy Creations (Popularity: )
http://www.synergycreations.com/
Developers of general educational software for the Macintosh platform, including Periodic Table software. Online purchasing available.

Atomic Mac (Popularity: )
http://www.blackcatsystems.com/software/atomic.html
An electronic version of the periodic table of elements with detailed physical and nuclear information.