Are you looking for people with particular skills?
Maybe you need skilled help with a technology that is decades old, maybe it is an extremely rare skill.
Maybe you are looking for people who attended a particular school or worked for a particular company.
Craigslist has a resume section where people can post their resumes. But Craigslist by design only allows you to look in particular geographical locations.
With this tool, you can search ALL craigslist resume sites domestically and internationally for specific skills, companies, locations etc.