Elegant Themes (the creators of the Divi theme for WordPress) have been kind enough to release a number of excellent Free Layout kits for Divi, in particular their 3 Wireframe Volumes are extremely useful to give you lots of options to get going on your Divi sites.
The ET Blog has lots of very useful info on there but can be a little difficult to navigate so I thought it might be helpful to list the Layout Kits here for ease of access.
Free Divi Layout Kit Vol 1
Free Divi Layout Kit Vol 2
Free Divi Layout Kit Vol 3