The Career Key - an online test which matches your interests and aptitudes to the Holland Career Codes, a system of clustering occupations. Headhunter.net - primarily for job seekers but includes information and links about careers, companies, resume writing, interviewing, etc. Career Exploration Links - link to University of California, Berkeley Career Library. Includes over 700 links by career. JobSmart Guides to Specific Careers - produced by libraries in the San Francisco Bay area, this site gives career, salary, resume writing and job finding tips.
Some information requires registering as a user.