This one is really good. Item contains the following device mockups:
- iPhone 5s
- iPhone 5c
- iPhone 4s
- Google Nexus 5
- HTC One
- HTC One Mini
- Samsung Galaxy S4
- Samsung Galaxy Note 3
- Motorola Droid Razr Maxx HD
- Motorola Moto X
- LG-G2
- Nokia Lumia 520
- iPad Mini
- iPad Air
- iPad 2
- Google Nexus 7
- Amazon Kindle Fire HDX 8.9″
- Microsoft Surface Pro 2
File formats are Adobe Illustrator files, EPS files, and OmniGraffle Stencil file.