I’m sure all of you know the search box in Internet Explorer!
You can search ANY searchable site there via pluggable search providers.
Per default some of them are installed, but you can add your own!
Here’s how to do it:
Note.. the search providers are standardized and will work in any browser, which supports the open search specification.
Note 2: Some sites are clever enough to include a search provider already!
Read here how you can solve equations, get the current weather or other thing directly in the search box.