- 
Daycgi
- 
Thorget.cgi --> Web interface to Daylight databases using
MCL and daycgi. J. Yang(latest version on the web site)
- 
depict.cgi -->Depicts a file containing SMILES strings as
gif images. J. Yang (on web site)
- 
Reactions
- 
reactions--> Several toolkit programs including reaction
paths, 
reaction searching and atom mapping. J. Delany(included in 4.51)
- 
transforms--> Several toolkit programs including transforms,
and a
mixture enumerator. J. Delany (included in 4.51)
 
- 
Chirality
- 
chiralify -->  generates stereochemical SMILES for molecules
with multiple chiral centra. D. Weininger (included in 4.51)
- 
mol2smi, smi2mol(formerly tdt2mol or tdt2mol_plus) -->Lastest
version is on the website improvements in  stereochemistry, atom "parity",
"up/down" bonds, 2D/3D coordinate maintenance and cis/trans specification.
J. Yang