SEO Success Mantra for Spiders, (Spiders and Robots), Spiders will begin to visit your website. Spiders are robots of search engines that index your website fully automatically. You can find a list of these spiders on our web-page. Check if it's possible for a spider to crawl your whole site. If a spider gets stuck somewhere in your website, place a new internal link and wait for the spider to visit your website again.
It's possible that a spider of Google or Fast visits your site twice before it lists your website. Keep your patience and don't submit your website again.
Well, known bots are :
Yahoo Slurp, Googlebot, Bing-Bot, LinkWalker, Alexa, Ask, and Voila