after a long time of searching and trying so many resources for free icons, I created this list and I used all of these packs and wanted to share it with everyone.

1. Emblemicons - An open-source free to use library of 1000+ most commonly and frequently used icons.
2. Unicons - 1000+ Pixel-perfect vector icons and Iconfont for your next project.
3. 700+ CSS Icons - Minimalistic icon library Designed by code. Customizable & Retina-Ready icons — entirely built in CSS
4. Fork awesome - A fork of Font Awesome, the iconic font and CSS toolkit, under GPL Licence
5. Twemoji - Twitter’s open source emoji has you covered for all your project's emoji needs. With support for the latest Unicode emoji specification, featuring 3,071 emojis, and all for free.
6. Remix Icon - Remix Icon is a set of open-source neutral-style system symbols elaborately crafted for designers and developers.
7. SuperTinyIcons - Under 1KB each! Super Tiny Icons are miniscule SVG versions of your favourite website and app logos
8. Eva Icons - A pack of more than 480 beautifully crafted Open Source icons. SVG, Sketch, Web Font and Animations support.
9. CoreUI Icons - CoreUI Icons is an open-source icon set with more than 1500 icons in multiple formats SVG, PNG, and Webfonts.
10. Heroicons - A set of free MIT-licensed high-quality SVG icons for you to use in your web projects.
11. System UIcons - A growing collection of simple and consistent icons specifically designed for systems and products. Use how you want, without attribution.
12. Boxicons - Boxicons is a simple vector icons set carefully crafted for designers and developers to use in your next project
13. Mono icons - A simple, consistent open-source icon set designed to be used in a wide variety of digital products.
14. Phosphor - Phosphor is a flexible icon family for interfaces, diagrams, presentations — whatever, really.
15. Glyphs - Fully editable & truly open source design system