>>>I maybe very wrong, but in the web world, just installing Bootstrap gives you some basic control over how you controls look. Is there something similar for WPF?
>>>I don't seem to find anything, I have a very basic little wpf application with a pageframe, buttons, textblocks and textboxes. But it looks very much like something I would have been writing in Winforms. :)
>>>I was hoping to install some kind of XAML library and voilà, my application would look like something made in the third millenium.
>>>Was I being a bit naive, and will I have to create my library myself, or are there (simple) libraries around that I can use and would give me a jumpstart?
>>
>>With WPF/Silverlight, you have complete control over the look and feel of your app. Take a look at Themes, Styling controls and Blend.
>
>Thanks John. I (think I) do know how to go about and change the look and feel of my app. It's just that I was hoping to get some kind of template that I could include so that I don't have to start from scratch.

Are you using a vendor's control pack or the default wpf controls? If you are using the default controls, here's a theming engine with a number of predefined themes. http://wpfthemes.codeplex.com/