1. Sketch Icon Set
2. Android Material Design UI Kit
3. Android L UI Kit
4. iOS 7 Icons: Natives and Basics
5. iOS 7 Status Bars
6. Free responsive wireframes
7. Google Material Design UI
8. Material Design by Google
9. Android L. Material Design
10. Sketch icons
11. iOS 10 UI Kit
12. Bootstrap 4 UI Kit for Sketch
13. iOS 7 GUI Content View Templates
14. Material Design Android
15. Material Icons Pack
16. iOS 9 UI Kit
17. Teracy - Wireframe UI Kit
18. 440 Free Icons
19. Bootstrap3 grids template
20. Bootstrap 3 Vector UI Kit
21. Graphs
22. Wireframing Template
23. iOS 7 Keyboard
24. FontAwesome Icons