Wilson JumaFor the period I have done Graphic and UX/UI Design, I have found these Icon resources to be useful.
1️⃣Freepik
2️⃣Glyphis
3️⃣Font Awesome
4️⃣Smashicons
5️⃣Iconfinder
6️⃣Shape so
7️⃣Flaticon
8️⃣The Noun Project
9️⃣IcoMoon
1️⃣0️⃣Icons8
1️⃣1️⃣Iconmonstr
1️⃣2️⃣Feather Icons
1️⃣3️⃣Material Icons
Enjoy 🎉🎉
