Via Google Fonts

Sans Serif

• Cousine
• Hind
• Inter (this is a variable font)
• Karla (this is a variable font)
• Lato
• Libre Franklin (this is a variable font)
• Mada
• Merriweather Sans (this is a variable font)
• Montserrat
• Noto Sans
• Noto Sans Display (this is a variable font)
• Nunito Sans
• Open Sans (this is a variable font)

Serif

• Alegreya (this is a variable font)
• Aleo
• Bitter (this is a variable font)
• Fenix
• Libre Baskerville
• Crimson Pro (this is a variable font)
• Crimson Text
• EB Garamond (this is a variable font)

Display

• Vast Shadow
• Barrio

Script

• Lobster

Monospace/Coding

• Anonymous Pro
• Fira Code (this is a variable font)
• Inconsolata (this is a variable font)
• Overpass Mono (this is a variable font)

Via Font Squirrel

Sans Serif

• Aileron
• Clear Sans
• Gidole
• Manrope

Display

• Langdon
• Mohave
• Nautilus Pompilius

Script

• Kitten

Monospace/Coding

• Bitstream Vera Sans Mono
• Deja Vu Sans Mono
• Droid Sans Mono
• Envy Code R
• Jetbrains Mono
• Office Code Pro

Other Sources

Sans Serif

• IBM Plex
• Public Sans
• Space Grotesk

Display

• Katahdin Round 2016
• Taurus Mono

Script

• Southpaw Revisited

Monospace/Coding

• Microsoft Cascadia Code (this is a variable font)
• ETC Trispace
• Hack
• Input Family
• JetBrains Mono
• League Mono
• Monofur
• Sometype Mono

Specialty

• Sparks - Font for creating sparklines