Feather Icons - Simply beautiful open source icons
Sketch Palettes - Sketch plugin to save and load colors into the color picker
IconStore - Free icon packs by first-class designers
Mute Crimson+ - A 'noir' style ninja action platforming adventure
Streamline icons - The world’s largest icon pack library - 100k icons and illustrations.
Color Palette Generator - Enter the URL of an image and find its color palette