FreelanceWriting.com Jobs: This is one the best sources of freelance writing jobs out there—an amazing resource, all free, writing jobs for print and Web.
FreelanceWritingGigs.com: New freelance jobs listed daily, as well as numerous articles and tips for writers.
Journalism Job Bank: UC Berkeley's list of job openings, divided into New Media, Newspapers & Wire Services, Television, Freelance, Magazines, etc. Jobs are nationwide, with new listings posted weekly.
JournalismJobs.com: Huge database of writing and editing jobs for newspapers, magazines, radio, television and online media. Also includes job opportunities for freelancers.
MediaBistro.com: Jobs listings for "media professionals." Many jobs for writers and editors.
Online-writing-jobs.com: Another great source of freelance writing jobs—thousands of ads seeking freelance writers of all types, print and web.
SunOasis Jobs: Extensive, nationwide on-site and off-site, full-time and freelance/contract job listings for writers, editors and copywriters. Good source for freelance and Web editor/writer jobs.
Telecommuting Job Opportunities for Writers: This site doesn't change all that often but it can be a limited source for freelance/contract job leads. Part of a larger site called Telecommuting Jobs.
The Write Jobs: Created by Writers Write, this site maintains a current listing of all sorts of writing jobs, nationwide.
WAHM.com: WAHM stands for Work At Home Moms, but you don't have to be a Mom to appreciate the value of this site. New jobs are posted daily on the Telecommuting Jobs page, and although only a few jobs listed are for writers, this site is well worth a visit every now and again, especially if you want to branch out into other freelance/work-at-home areas.