PyMOL Plugin for displaying polar contacts. Good hydrogen bonds (as determined by PyMOL) are shown in yellow. Electrostatic clashes (donor-donor or acceptor-acceptor) are shown in red. Close (<4.0 A) but not ideal contacts are shown in purple. Cutoffs are configurable. Exports the command contacts which takes two selections and an optional name for the generated contacts group. Alternatively, the selections can be chosen using a dialog box accessible from the Plugins menu.
To install, provide the URL to the raw source code: https://raw.githubusercontent.com/dkoes/show_contacts/master/show_contacts.py