luscus
molecular editor and viewer
... interface for MOLCAS program package, however it's adaptive nature makes possible using luscus with other computational program packages and chemical formats.
If you use this program, please cite: G. Kovačević, V. Veryazov, J. Cheminformatics, 7 (2015) 1-10;
DOI: 10.1186/s13321-015-0060-z