I got a good tool......How about a recruiter? ; )
Job aggregators are an effective way to cut-through the online-recruitment chaff.
JobisJob.co.uk helps job-seekers scour the market for all available jobs; we also present all of the information needed to allow our users to make a quick and informed decision, about any available position.
I apologise if this seems like a biased post (it is).
Jason, thanks for including JibberJobber.com on the list. I founded it almost 6 years ago. As a job seeker with an IT/PM background I had looked for tools that would go in a toolkit for job seekers and found it very, very hard to put something like that together. Many tools looked like they were for job seekers, but they were for companies who would pay for something (like job postings). Other "tools" where simply information/articles... sometimes helpful but many times just the same old incomplete cliche junk that job seekers can read on any website...
I look forward to seeing what other tools you come up with :)
CEO - JibberJobber.com