Coot is a graphics program for building, refining and analysing macromolecular models obtained with crystallographic procedures.
Availability:
Available on Managed Windows workstations via WPKG.
Licence Details:
According to http://www2.mrc-lmb.cam.ac.uk/Personal/pemsley/coot/ :
"Mostly GPLv3, some GLPv2+, some LGPLv3."