From the U.S. Dept of Labor. Gives overviews of careers, salary, training, skills, and more. Use the OCCUPATION SEARCH to look for a specific career, or browse under FIND OCCUPATIONS. Under TOOLS & TECHNOLOGY you can search by skill set.
Click the DETAILS link by VIEW REPORT to get the most specific information about your field.
Also allows search by factors such as Green Jobs for eco-friendly careers or Bright Outlook for expanding fields.