Sketch 2 Code - Turn hand-drawn design into a HTML with AI. By Microsoft.
Feather Icons - Simply beautiful open source icons
Schwartz - Very similar to paintcode but costs wayyy less
Icons8 - Free app for Mac & Windows already containing 39,800 icons. Allows to search and import icons…
PaintCode - PaintCode is a unique vector drawing app that generates Objective-C or Swift code in real time, acting as a bridge between developers and graphic designers.
IconBros - Free and continuously growing high quality icons