There is a tremendous amount of information available on the Web for Human Resource professionals. Unfortunately, much of it is devoid of substance.  On the plus side, almost all of it is free.  I have listed below some of the sites that we find to be most interesting and/or useful.  Please feel free to pass on any that you feel should be added.

Original Research on HR Topics

Employee Benefit Research Institute
Center for Retirement Research at Boston College
Health as Human Capital Foundation
Commonwealth Fund
US Department of Health and Human Services - Planning and Evaluation
The National Committee for Health Care Quality Assurance
Knowledge @ HR

Resources & Partners

Elm Income Group (cost effective annuities)
Legal Bit Stream (general tax research)
Workforce Management (on-line version of the HR journal)
Becker Multimedia (best-in-class employee training)
Retirement Capital Group (innovative executive retirement solutions)
BenRx (experienced, cost-effective advisor on H&W issues)
Halaburt Advisors (experienced resource and advice on HR outsourcing)

Interesting Commentary from Regular Bloggers

SystematicHR
Evil HR Lady
Curious Cat Management Improvement Blog
Harvard Law School Corporate Governance Blog