free icon sites & services.
4 of the 8 in the list are free to use or have a free plan. First: Icons8. Icons, illustrations and photos for designers and developers.
4 free, in order.
all 8 in icon sites & services- Place 1
Icons8Icons, illustrations and photos for designers and developers. - Place 2
Font AwesomeA library of icons to add to websites and apps. - Place 3
Bootstrap Icons - Place 4
Heroicons