1. The Dream-Quest of Unknown Kadath and Other Stories. Complete and faithful adaptations by Jason B. Thompson.
2. Necronauts. “In 1926, while practising a new trick, Houdini has a near-death experience, awakening the mysterious Sleepers. Meanwhile, Lovecraft is visited by a talking raven, and a seance that Sir Arthur Conan Doyle is attending is attacked by a strange force that possesses the medium.”
3. The Starry Wisdom. Has John Couthart’s comic book adaptation of The Call of Cthulhu. Also in his Haunter of the Dark and Other Grotesque Visions.
4. Skull Comics
5. Heavy Metal Lovecraft special issue. Sept 1978 in France as Metal Hurlant magazine, and October 1979 in the USA version of the magazine.
6. Alan Moore’s Yuggoth Cultures and other Growths
7. Alan Moore’s The Courtyard.
8. Alan Moore’s Neonomicon. (Continues from The Courtyard).
9. The Lovecraft Anthology. Volumes One and Two (two coming in spring 2012).
10. Lovecraft in Full Color (Adventure Comics series, 1992). Heavily modified modern adaptations of “The Lurking Fear”, “Beyond the Wall of Sleep”, “The Tomb”, and “The Alchemist”.
11. Cthulhu Tales. Seems to have run for about 12 issues.
Also: due in March 2012, The Case of Charles Dexter Ward adapted as a graphic novel.
Need details of more, including all the Marvel, Warren etc adaptations? See Lovecraft in the Comics.