Here's website that has a boatload of symbols. some you may know and others you may not have thought would be associated with Wicca.
http://paganwiccan.about.com/od/bookofshadows/ig/Pagan-and-Wiccan-Symbols/
http://paganwiccan.about.com/od/bookofshadows/ig/Pagan-and-Wiccan-Symbols/