WikiBuddy is a great application for anyone who uses Wikipedia frequently. It sits on the menubar, from where you can carry out a search by simply clicking on its icon and typing your search. The app will show results as you type, and you can scroll down to see them all. When you click on a result, a new window will appear with the article that you selected. This window does a great job of displaying Wikipedia articles. I like the fact that you can access different parts of the article via buttons at the bottom of the window. Hypertext links are also active, and if you click on a link about a different Wikipedia article, the app will open that article on the same window. If you want, you can open a link on your web browser or copy links to the clipboard. At the top of the screen, you will find some buttons that let you search the article for any word, see a list of all the links within an article, change the language of the article (if it is available in a given language on Wikipedia), bookmark an article and even see the sections of the article.
Overall, I found WikiBuddy to be a great way to browse Wikipedia and search and read articles. The only thing that I did not like about it is that it doesn't have a Dock icon, so to switch to an open article, you have to click on the menubar icon and then click on the article from the results list and open it again or use expose to find the open article.