• RetirementJobs.com has more than 30,000 listings nationwide from companies specifically seeking candidates older than 50. A combination job board, adviser and coach for boomers and seniors looking for work. RetirementJobs also partners with AARP.

• RetireeWorkforce.com also focuses on the 50-plus job candidate. Currently gets about 200,000 visitors a month, doubled from a year ago and up sharply during the financial crisis.

• RetiredBrains.com is a resource for older boomers, seniors, retirees and those about to retire who are looking to find jobs, volunteer opportunities, educational resources and retirement information.

• Retirement Jobs Online (www.retirement-jobs-online.com) offers advice about online retirement jobs, helping retirees evaluate the various ways to use the Internet to find work.

• AARP offers both a job search engine (jobs.aarp.org) and a National Employer Team (www.aarp.org/employerteam), which lists employers that are actively recruiting mature workers nationwide. Most are corporations; also cites three government agencies: the Internal Revenue Service, the Peace Corps and the Small Business Administration's Office of Disaster Relief.

• Aging Workforce News (www.agingworkforcenews.com/aginglinks.html) is not a job board but provides a useful collection of work-related links.

• BoomerCareer.com is a collection of career articles and resources targeting baby boomers, those born from 1946-64. Job-seekers can search job listings and post their resume.

• Encore.org provides news, resources and connections for individuals and organizations establishing "encore careers" designed to combine social contribution, personal meaning and financial security. Many of the jobs posted are in education, health care and human services.

• Experience Works (www.experienceworks.org) helps low-income seniors get training to find jobs in their communities.