I use Fontastic.me for my icon fonts, to use in Webflow, in other sites, in apps. This tool is made by a guy named Vincent le Moign, the author of the well known Minicons icon pack and the Streamline icon pack. His company is Webalys and I use quite a lot of their tools.
Fontastic is great. You can select from a vast bank of free icons, buy some more bigger packs and upload you own fonts. The UI is great.
Another cool resource, has been posted by a mod on this forum this week, is the Chrome extension Colorzilla. Basically it gives you an eyedropper for Webflow (and all other online tools)