Actually: No, there aren’t any.
This is because some people only want to change one or two small things, other (like me) change the whole design. Additionally, the screen objects added to the playout window may vary from user to user.
A premade skin or anything like a template wouldn’t help.
You will find some code examples in threads like this:
- What does your Mairlist look like?
or in german (which has no influence on the code): - [Layout & Skin] Zeigt hier eure Designs!