iA Writer Fonts
The iA Writer fonts comes bundled with iA Writer for for Android, Windows, Mac, iPadOS and iOS.
This is a modification of IBM's Plex font. The upstream project is here Please read the licensing file before working with it.
Heydings - A Free Icon Web Font
Web Symbols typeface
Modern Pictograms
Designed to work in any context at any size, even on retina displays