Compensation Cafe shares compensation insights from several well-respected contributors.
Salary School provides free spreadsheet versions of DOL state minimum wage rates.
The United States Department of Labor provides information related to federal laws such as overtime, paychecks, etc.
The US DOL – Wage & Hour Division provides state and national minimum wage information.
SHRM dedicates a section of their website to compensation articles and resources.
HR Executive is a good resource for benefits news and updates.
HR-Guide also has a good section of compensation resources.