For a long time, I have had my eyes set on getting Articles, a gorgeous app that allows you to browse Wikipedia in a little more user friendly fashion on the iPhone (and iPad). For various reasons I've never gone ahead and done it but when they had a sale a while ago I couldn't resist.
Articles let's you as I said, browse articles on Wikipedia in a better user interface. Instead of the incredibly annoying mobile version of Wikipedia you get an app which is cleverly designed just as Safari is itself. This means that you can have multiple tabs of Wikipedia searches open at the same time something which is quite useful.
Searching is very easy and the results come back in a nice display. One major gripe I have though is that the useful table of contents isn't available in Articles. Personally I use this all the time to find out where to go in an article or if the article is worth reading. If this isn't there, much of the usefulness has been lost.
On a positive note it will easily share articles via mail as well as bookmark them to its own built-in bookmarking system. Changing between different languages could also be made simpler by only showing the languages an article is available in.
While the app is gorgeous there are a few major flaws to it that stop it from becoming a true wikipedia website replacement, which is sad because it looks so nice. However, if you want an app that displays wikipedia results slightly better than the website, go for it!