A popular site which has a great number of categories. Good place to start a search. Searches tend to return a large number of sites. For very specific terms, you might have better luck with AltaVista. TechCrawler ,as you might guess from its name, is for tech pros.
All results come from the Web's top tech sites.
It will construct a query and submit it to multiple search engines. Returns are arranged by search engine. There are frequent repetitions. This engine integrates returns, avoiding repetitions. ProFusion lets you choose which engines it will search.