While the serious talk today is about Freebase, a new next-gen search engine from Danny Hillis, it's the end of the week and so time for a bit of fun. Author of the popular Top Alternative Search Engines list, Charles Knight, flicked me an email this morning with an example of a weird alt search engine that he'd discovered: www.ufocrawler.com/search.

That got us to thinking about what other 'weird' search engines are Out There. Below is a short list that Charles came up with (his knowledge of alt search engines knows no bounds!). But we'd like to throw this open to you, the readers, as a kind of Friday or weekend survey. Please let us know in the comments about the weirdest alt search engines you've come across!

Add your suggestions below...