Here is another of those massive, aggregated pages. All-In-One Search Page not only lists just about EVERY search engine available, but also provides countless other reference and look-up resources.

And, again, you won't be cruising through it in a few minutes if you really intend to use it: sit back with a favorite snack and be ready to spend most of the day following the links and learning the categories.

Other great sources for "everything you always wanted to know about search engines" can be found at The Search Tools site and at Search Engine Watch