Model Evaluation

CastP - Volume and surface calculation of pocket or cavity
CASTp - webserver for identification and measurements of surface accessible pockets as well as interior
DIMPLOT - Interactions between monomers of a dimer
FADE and PADRE - Shape and Complementarity Server
GRASP
LIGPLOT - Interactions around a ligand of piece of structure
NACCESS - Surface area calculaitons, per residue, or atom
NCONT - (ccp4) analyses contacts between subsets of atoms in a PDB file
Protein-Protein Interaction Server - stats on your chain interfaces and to obtain surface calculations
PARVATI - anisotropic displacement parameters statistics
[1] - SURFACE and AREAIMOL (ccp4) -surface programs
VOIDOO - look for interior cavities
VADAR - (Volume, Area, Dihedral Angle Reporter)

STING Millenium - web-based suite of programs for visualizing molecular structure and comprehensive structure analysis:inaccessible cavities