Where to get icons and other art work for an app UI?

Font Awesome[^] is an SVG icon set designed for use in web pages. However, it can also be easily used in desktop and mobile applications. It has a very liberal license (SIL Open Font License (OFL)).

You ve got Fatcow icons too, it s a free pack of usefull icon which are in commons licence, you only need to put a link in your credit.

http://www.fatcow.com/free-icons

I can recommend Metro Studio: over 4000 customizable icons, for free!
http://www.syncfusion.com/downloads/metrostudio

Have used Silk icons in the past. Neat, tidy and free Thumbs Up | :thumbsup:

http://www.famfamfam.com/lab/icons/silk/[^]

Daniel Brown
Senior Solutiuons Architect