Direct Hit (from AskJeeves) is a search engine. Copernic is a software that searches multiple sites. Flyswat is a way of interfacing a messaging board with your browser. I’ve heard they’re all cool.
Search engines
I've shared some interesting search tools I've come across, including Direct Hit by AskJeeves, the Copernic multi-site search software, and Flyswat, which integrates message boards into your browser for better web navigation.