I used registercompass.com before, since they are not provide full info. I tried dropday.com they provide all more info. and it`s free
I noticed that they added some new services, domain typos and traffic statistic.
I just loaded up the last pieces of the first beta this morning. The big goal of my site is to filter out the garbage, eliminating the sites with no Alexa, no PR, no links, longer than 4L with no vowels / syllables, etc.).
The list also tries to compile against English dictionary words and Google trends. This is more thoroughly integrated on the drop side than the expire side.
It is currently 100% free. It's my hope to keep it that way, but I won't deny that determining whether free is a viable business model is an important part of the beta testing.