Classy icons crafted according to Microsoft guidelines. Available in PNG and SVG. Free for a link
Mimo - Learn how to code on your iPhone📱
Feather Icons - Simply beautiful open source icons
Py - Learn to code on the go 📱
IconStore - Free icon packs by first-class designers
Enlight - Performance and Error Monitoring. We keep an eye on your applications and notify you about performance issues and errors.
Flat Icons - 20,000 unique, customizable icons with free lifetime updates