Job Search Engines

I am curious to learn which job search engines are catching the attention of both job seekers and hiring managers today. There seems to be a shift away from CareerBuilder for job seekers and certainly a shift toward more third party visa holders who could only be hired with sponsorship for contract work. JobCircle's candidate pool is growing quite a bit and responses to postings there have improved significantly. I have become a friend of Craigs List in the last few months after experimenting with a few postings out there. Response to those postings was so strong that I now post with them almost daily. The only real drawback is you have to post in metro areas individually which takes a little time but, for now at least, postings are free! Please write me with your favorite engines.