Bureau of Labor Statistics/Occupational Outlook Handbook  - A "go-to" resources for almost every career.  Offers information on salaries, job prospects, educational/training requirements, etc.

Occupational Outlook Quarterly - Similar to the resource above (OOH).  May offer identical information - or different, highly informative information.

USA.gov - Official search engine of the U.S. Government.  This will search every government department at all levels of government: federal, state, and local.

Infotopia.info - This is a filtered Google search.  This means that someone (yes, a real person in this case) has sorted out all of the junk from a basic Google search and left the more useful resources.

DMOZ.org - This is a directory maintained by real live librarians (as opposed to Internet search spiders).  All resources have been vetted as useful and valid.  Try general key word search i.e. "forensic careers" or search for specific forensic careers.

Beaucoup - This is another directory - this one is maintained by one individual.  Although some of the returns aren't the best for research (i.e. Wikipedia), there is much information available with this directory.

Instagrok  - An unusual style of search engine.  This helps you limit your search in a unique way.