This is a thread dedicated to "people search engines". Some are free of charge, others will charge a fee. It's important to remember that *several of these sites WILL send an email to your "target" email, alerting them that they've been searched.

List of sites:

123people.com spoke.com
123peoplesearch.com *spokeo.com
411.com the-seeker.com
iaf.net usernamecheck.com
isearch.com whitepages.com
lullar.com whowhere.com
peekyou.com wink.com
pipl.com *yoName.com
phonenumber.com zabasearch.com
*rapleaf.com zoominfo.com
searchbug.com Find.com
skipease.com yasni.com
snitch.name/ corporationwiki.com
addictomatic.com phonewhois.us
CV Gadget
Whos Talkin
Same Point

Social Mention

This one is a bit different http://www.criminalsearches.com/default.aspx
It allows you to search criminal records including traffic offenses. We searched a few relatives and were able to pull up some traffic tickets, dates of births included. Should be fun to see what you can find. Happy hunting!

If you have any others to post, feel free! This is the place to do it.