General (Inclusive of all industry areas)
Headhunter.net - Very good site that you can search by occupation, location, salary, etc.
4Headhunters.com - All inclusive site that provides links to general, medical, tech and attorney recruiting agencies.
NetTemps.com - Variety of job categories.
Online Recruiters Directory - Lists some contacts by country and state.
Fifth Avenue Executive Staffing - New York's premier computer staffing agency.
Teacher Placement Agencies