Around the web
Serif fonts
Bitter used on http://elixir-lang.org/
Enriqueta used on http://benlog.com
Linux
non-HiDPI
Used on ThinkPad T530, Shimian 2560x1440s.
In /etc/lightdm/lightdm.conf, under [SeatDefaults]: add "-dpi 86" after xserver-command.