S: (Text-based) KU Lynx
A+: (Chromium-based) Chromium, Google Chrome, Comodo Dragon, SRWare Iron, RockMelt
A: (WebKit-based) Apple Safari, GNOME Epiphany, Maxthon
B: (Gecko-based) Mozilla Firefox, Moonchild Pale Moon, SeaMonkey
C: (Presto-based) Opera
D: (Trident-based) Microsoft Internet Explorer, FlashPeak SlimBrowser, Fenrir Sleipnir, Lunascape
D-: (China-based) Avant, MoreQuick GreenBrowser, Phoenix TheWorld
E: (KHTML-based) KDE Konqueror