free software which could assign atom types



 Hi all,
 I have a molecule in two dimensions (connections between atoms) and
 another one in three dimensions (PDB format). Is there any free software
 which could assign atom types (hybridization state)?
 Lot of thanks in advance
 Anwar
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 Dr. Anwar Rayan
 Department of Medicinal Chemistry
 School of Pharmacy
 The Hebrew University of Jerusalem
 P.O.B. 12065
 Jerusalem 91120
 Israel
 Tel: +972-2-6757540
 Mobile: +972-55-848-338
 Fax: +972-2-6757-076
 Email: anvarr(-(at)-)md.huji.ac.il
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