WP Plugin Directory - A smarter way to find WordPress plugins
Avogadro - Avogadro is a free, fantastically easy to use molecule editor.
AmaLinks Pro - All-in-one WordPress plugin for Amazon affiliates
ChemDraw - ChemDraw - The Gold Standard for Chemical Structure Drawing and Research Publications.
Plugin Table - Periodic table of all the most popular WordPress plugins
ACD/ChemSketch - ACD/ChemSketch for personal and academic use brings the power of our structure drawing package to your home computer.