Look into Staffingforce.com. Our web-based ATS SaaS is designed to support the recruiting efforts of the Independent & Small Agency Recruiter. We provide a full suite of back office services including; bank rolling payroll for temp/contract placements, providing workers comp & other insurance, and billing (including collections when necessary). I joined because I too was an Independent looking for more resources and I haven't been disappointed. Feel free to call if you want more details.
RuthAnn ~ 610.363.3519