KiCAD: Advanced Tutorials:Arduino UNO with KiCAD
Arduino UNO with KiCAD
This is a complete series of video tutorials on how to build a Arduino UNO [derived version] with KiCAD. We have choosen this example as it has fair mix of components, is widely known and fun open source board to Hack. Hope this helps you in learning KiCAD in depth.
All the design files, libraries that were used through out the project can be downloaded here