Safari Keyword Search a simple extension that works with Safari 5.1 or later. It can change the default Safari search engine, and allows keyword searching from your address bar. This simple, but powerful feature allows you to access multiple search engines by simply typing simple keywords. You can search Wikipedia for information about monkeys by typing
w monkeys into the address bar.
These searches are included in the default set
Any search engine can be made the default. When no keyword is given, the default search engine will be used. The default search engine
uhm is regular Google search. To edit, delete, or add your own search engines, right-click on any web page and choose "Keyword Search Settings". You can edit or delete existing search URLs and keywords, as well as modify and add new ones. To insert the search string, type @@@ or %%%. If you prefer spaces encoded with %20 rather than +, then use %%%. If you only need quick bookmarks, it is possible to have keyword extensions without search strings.
The software is free but it is donationware. To support development, please consider donating.