- http://www.sketchappsources.com/ (local!)
- http://brilliantsketch.com/
- http://www.bohemiancoding.com/sketch/resources/
- http://bohemiancoding.com/sketch/community/
- https://ui8.net/category/sketch
- https://www.youtube.com/watch?v=AV2OkzIGykA
- https://medium.com/@sokratus/how-to-create-a-flat-styled-icon-in-sketch-3-27c4bd09989
- http://styletil.es/
- http://alistapart.com/article/style-tiles-and-how-they-work
- http://www.sketchcasts.net/episodes/working-with-bootstrap