US Business Advisor contains a lot of helpful information for anyone starting or managing a business. There is information on regulations governing the workplace, including laws regarding compensation and benefits, equal employment, proper treatment of disabled persons and more.
Similar to the US Business advosor, the SBA is focused on the entreprenuer. You can find a lot of resources on financning new businesses, developing a business plan, types of business structures, how to get the required business licenses, and more.
This resource contains a wealth of data on various laws governing business practices and operations. Covered are both federal laws governing all US based business, and well as state specific laws.
For those who would like to partake in a franchise, the FTC has a great resource for both complaints, as well as housing all US regulations covering franchises.
Another great resource for franchise owners is the NASAA. This organization maintains a list of all state based franchise regulators.
SCORE, a partner of the SBA listed above, is an organization comprised of current and former business owners, and corporate leaders that work to help new business owners through a website full of helpful information. Also available is a counseling service for those individuals struggling with a new business.