If you’re intended to prototype your SharePoint screens in your projects, you can use Balsamiq tool for drawing mock-up screens. Balsamiq is very useful wire-framing tool which provides lots of templates for drawing mock-up screens. You can find lots of templates from myBalsamiq site.
For SharePoint 2013, James Sturges has prepared a mock-up template. So you can easily prepare wire-frame of a SharePoint 2013 portal by this template.
If you want to wire-frame SharePoint 2010 screens, there is also a template for that prepared by James. You can download it from here.
Besides myBalsamiq site offers some other templates for SharePoint 2010.
Hope these help 🙂