Norwegian designer Jan Wennesland brings us this useful font pairing side project called ‘Font Flame’. The UX is super smooth – Jan likes to coin it “Tinder for font pairing”.
This website has unfortunately been redesigned or gone offline, so I have removed the direct link to it. The screenshot below hopefully preserved enough of the design but if you are really keen to inspect further, try this Archive.org link. FYI: the site was first featured on 26 August 2015.