Website: https://www.first.org
FIRST is the Forum of Incident Response and Security Teams. Their site includes frameworks for CSIRT (Computer Security Incident Response Teams) and PSIRT (Product Security).
They also have publications, best practices, and a library of refrences covering a host of topics around incident response. How to set up a CSIRT, an Acceptable Use Policy Template, and articles on Data Privacy are just a few of the items you can find on this site.