Feather Icons - Simply beautiful open source icons
Nucleo - Commercial vector icons and accompanying apps to manage and customize them.
Icons8 - Free app for Mac & Windows already containing 39,800 icons. Allows to search and import icons…
Fontello - Tool to build custom fonts with icons.
Streamline icons - The world’s largest icon pack library - 100k icons and illustrations.
IcoMoon - IcoMoon is an icon management tool that is build to provide iconography.