Grimarillion is a compilation of several mods. Included mods are Grim Quest, Zenith, Diablo3, Grimmest, Hairstylist, Shattered Affixes, GrimUI, Lornlyx journal and faction QOL, Reskill, Personal Hideout, Grim Armor, Priest Mastery, and Darkest Dawn.
Grimarillion v90a update, this is a minor update from v90 that mostly contains bugfixes. Check the forums for more info.