IconStore - Free icon packs by first-class designers
Proof.ink - Proven immutable data stored on the Steem blockchain
Feather Icons - Simply beautiful open source icons
Immutable.js - Immutable persistent data collections for Javascript which increase efficiency and simplicity. - immutable-js/immutable-js
Streamline icons - The world’s largest icon pack library - 100k icons and illustrations.
DataTip - The fastest way to store & access your critical datapoints.