[http://consurf.tau.ac.il/ ConSurf] web server - they now also have [http://bental.tau.ac.il/new_ConSurfDB/ precalculated results] for proteins deposited in the PDB
−
[http://www.mcgnmr.ca/ProtSkin/intro/ ProtSkin] web server
+
[http://www.mcgnmr.mcgill.ca/ProtSkin/ ProtSkin] web server
[http://www.mcb.ucdavis.edu/faculty-labs/lagarias/homolmapper_home/homolmapper%20web%20page.htm Homolmapper] software: you can map several conserved properties onto your structures, not just plain sequence.