JChem for Excel
JChem for Excel allows scientists to use ChemAxon toolkit in Microsoft's familiar spreadsheet application. Easily add, edit (on double click) and delete structures, with undo support. Structures move and size with cells, so operations such as copy(cut) - paste, sorting and filtering run smoothly. Import structures/data from, and export to popular chemical file formats, and import from various databases. Calculate molecular properties with the help of custom chemical excel functions.