Feather Icons - Simply beautiful open source icons
Icons8 - Free app for Mac & Windows already containing 39,800 icons. Allows to search and import icons…
Streamline - Streamline is a web-based vacation rental software that manages vacation rental properties with flipkey integration, online booking, lead management, credit card processing, etc.
The Noun Project - Creating, Sharing and Celebrating the World's Visual Language
Flat Icons - 20,000 unique, customizable icons with free lifetime updates
Flaticon - A database of free vector icons.