Qwiki for Mac Lets You Search and Read Wikipedia Right From the Menu Bar
OS X: If you visit Wikipedia frequently with your questions and want an encyclopedia a click away, Qwiki for Mac brings the site to the menu bar without having to launch a browser.
The simple app adds a Wikipedia search box right to the top menu bar, so you no longer have to pause to launch your site every time a trivial question itches at heart. You can also copy the link to the article you are reading, open it in a browser, or email it, tweet it, or wherever you want. It’s not free, but it’s only a dollar.
Qwiki ($ 0.99) | App Store