Indeed.com
This one surprises even the most experienced of recruiters. That’s right: one of the most highly trafficked websites for job seekers has free job postings.
To start posting, just start here: http://www.indeed.com/hire
AngelList Jobs
Angel List is a new kid on the block. Look past it’s startup and angel community roots. It’s got a robust network of talented candidates.
Start here to post on Angel List: https://angel.co/recruiting
Flex Jobs
Looking to tap into a large community of folks ready and willing to telecommute to their jobs? Flex Jobs is a fantastic resource.
Post for free here: here: https://www.flexjobs.com/Members/Employers/Register.aspx