I didn’t post anything in a long time, was busy and was tripping around Europe. Finally have time to share some useful links.
1. 1200px it’s really cool instrument for making custom grids and then you can download in .psd, .eps or CSS
2. Flatuicolors one more instrument for matching the colors.
3. Collectui it’s a library of ready patterns for UI
4. Pttrns same with number 3
5. Some UX stuff as well will be useful to read
6. Pexels this is the huge base of free stock images
7. Publicdomainpictures same shit with number 6
8. Pngimg really cool website with a lot of transparent background images