
| Robots.txt Keep robots out with the Robots.txt file |
| Who's knocking on the door? Explaination of robots.txt & the nofollow meta tag, has examples |
| Database of robots |
| Web robots FAQ |
| Robots.txt generator From SEOChat |
| htdig Free crawler |
| Lucene/Nutch Apache's crawler software (free) {Java} |
| Robot Trap How to keep bad robots, spiders and web crawlers away |
| Php Dig Web spider & search engine [php & mysql] |