| Name | URL | Criteria | Robots? | Submission |
| Table compiled by Marion Cable Part 2 |
||||
| www.google.com | No exclusions found. | Yes | Automatic | |
| All The Web | www.alltheweb.net | No exclusions found. | Yes | Automatic |
| WiseNut | www.wisenut.com | No exclusions found. | Yes | Automatic |
| Aeroseek | www.aeroseek.com | Aviation only | No | Info not available |