A 2D chemical structure editor is a key component in most cheminformatics systems. With an ever-increasing number of groups using the Web as a cheminformatics platform, the need for a structure editor built specifically around the capabilities and constraints of the Web becomes more apparent.
For the last several months, my company (Metamolecular, LLC) has been developing a 2D structure editor called ChemWriter(TM). It was created specifically to solve the problem of building interactive, chemically-enabled Web applications that look good and load fast.
You can now download a free, fully-functional, non-expiring copy of ChemWriter (the ChemWriter Starter Package) good for development and testing of your chemically-aware Web application. The Metamolecular Company Blog has the details.