I have quite a few.
Graveyard Wanderers by Dr Tom Johnson, an exploration of necromantic spells and rituals in the Swedish tradition.
Trolldom by Johannes Gårdbäck, a book of spells (very well organized, in my opinion) in the Scandinavian tradition of Trolldom.
Encyclopedia of 5,000 Spells by Judika Illes is, of course, a classic.
Carmina Gadelica by Alexander Carmichael is a book of Scots Gaelic spells and prayers and blessings.
Mastering Witchcraft by Paul Huson is technically a book of spells and rituals.
The grimoires are much the same. Grimoire.org is a great online resource as a quick reference guide.
Witches’ Potions and Spells by Katheryn Paulsen is a quite literal list of spells. Caution should be taken, as many of them contain poisonous ingredients.
Those are the ones I like and reference often.