VISCO:The visual index of science fiction cover art. Has gallery with hundreds of old SF magazine covers (many pulp titles).
Analog Cover Art: Archive of cover art from the SFF magazine Analog 1966-70.
DM O'Keefe: Ebook cover illustrator.
Duncan Long: Gallery of SFF book cover illustrations from Duncan Long.
If Science Fiction: Cover Art: List of cover artists associated with the various issues of the classic SF magazine If.
Interzone Science Fiction: Cover Art: List of cover artists for the various issues of literary British SFF magazine Interzone.
Pierre Fortin Arts: Book cover artist for SFF.
Science Fiction Weekly Art Gallery: Science Fiction Weekly's gallery of past cover art.
SF Cover Explorer: Artwork created from pictures of 3500 covers of sf magazines.
SFcrowsnest: Art for SF's Sake: SF editor John Jarrold issues a plea of tolerance for creative art on science fiction and fantasy book jacket covers.
SFcrowsnest: The Slow Death of Science Fiction Art: Article on the poor quality of modern SFF cover art, compared with the classic pulp era covers.
Solar Voyager: Space art gallery.