githugs.orchestra.io (githu.gs if the domain would propagate)
githugs will randomly choose one person a day to hug on github (example). Just add your name and wait for hugs!
The actual githugs repo contains sensitive information (github token, etc.), so this is a public mirror of that repo with sensitive information removed.
Githugs was originally a node.js app that I quickly ported to PHP. Fortunately, it was a snap to port and deploy with http://orchestra.io/ ;)