Fonts served by oddbench.co, all under the SIL Open Font License 1.1 (see OFL.txt).

Inter            Copyright (c) 2016 The Inter Project Authors (https://github.com/rsms/inter)
IBM Plex Mono    Copyright (c) 2017 IBM Corp. with Reserved Font Name "Plex"
IBM Plex Serif   Copyright (c) 2017 IBM Corp. with Reserved Font Name "Plex"
Caveat           Copyright (c) 2014 The Caveat Project Authors (https://github.com/googlefonts/caveat)

Latin subsets as packaged by Fontsource (https://fontsource.org).