iBabel gives access to chemical file conversion, sub-structure searching, overlays, sorting and manipulation of lists of compounds, also include structure viewing capabilities, using JMOLand JChempaint. Provides a GUI to ChemSpotlight allowing searching your hard drive for chemical content.
Version 2.5.2: This is a minor update (26 Feb 2008) that fixes an issue where the viewer displays HTML code rather than the structure, this seems to only effect a very limited number of users but the fix should avoid the problem in the future.