Google Fonts - Making the web more beautiful, fast, and open through great typography
Git Sketch Plugin - Version control for designers
Typewolf - Typewolf helps designers choose the perfect font combination for their next design project—features web fonts in the wild, font recommendations and learning resources.
Select Similar Layers - Sketch plugin to select layers with the same attributes
Font Generator - Tons of font ideas in one click
Floverview - Hybrid mapping for flow overviews