In no particular order :-
1. Meta Glossary - Search for definitions or meaning of words. Like a constantly updating dictionary.
2. PopURLs - Not really a search engine, but does offer a way of finding what it trending across the web. A list of sites from around the web are aggregated together with links to popular stories, articles or videos.
3. Joongel - Still uses most of the mainstream search engines, but allows you to easily switch your search results with a toolbar like function. Google seems the default, but shows the different results available when using different search engines.
4. Similar Site Search - The name says it all. Find sites the are similar to what your after. Enter a website URL to find similar topic related sites.
5. Top Site - Search for the top 10 sites on the net related to a particular topic. Don't know who rates the sites, but give it a try anyway.
6. A-Z Mp3s - Search for those tracks that you just can't find anywhere else.
7. Duck Duck Go - Search with a difference, instant answers and great results.
8. Tune Find - Ever been watching a movie and wanted to know what the soundtrack was, then Tune Find is the search engine for soundtracks from TV and Movies.
9. Download Stuff - Download Any stuff allows you to search for files, movies, ebooks and the like.
10. Router Passwords - Need to search for the default router password for your device. Then look no further.
11. spezify - Type a word or phrase and be presented with a graphical search result.
12. Blekko - Another search engine with a difference, can also be used to search for images.
