I've seen these on other sites and I couldn't resist them! I don't think I used them in my older sites. The website communities I was a part of didn't really have them. We tended to use text links or banners to link to each others' sites. I've made some myself and snagged the rest from Web Badges World. These badges are 80x15, and may have been associated with specific sites/communities. I was not necessarily a member of any of them.