Safari users: ever wanted to quickly search Wikipedia, or use a search engine besides Google? Then Keystone is what you've been looking for!
Keystone adds custom keyword searches to Safari. Type simple queries such as "wiki Mac OS X" directly into the address bar, and Keystone will translate them into searches—in this case, opening the Mac OS X page on Wikipedia.
Keystone works alongside of Safari's own completion system, which means you can choose which completions you want to use. It also includes autodiscovery, allowing you to turn any search field into a Keystone shortcut.
Keystone requires a recent version of SIMBL to work.
for Safari 4/5 on
Mac OS X v10.5 and later