The Psychotronic Guide to Archive.org (Archive.org collects moving images, recordings, live music and texts; its Wayback Machine preserves old Web pages from long-gone sites as well.)

Wikipedia defines Psychotronic:

Psychotronic is a film genre made up of horror films, spaghetti westerns, low-budget independent features, exploitation films) that was coined by author Michael J. Weldon, best known for his books, Psychotronic Encyclopedia of Film and Psychotronic Video Guide....

The genre takes its name from the movie The Psychotronic Man. After seeing this movie, Michael J. Weldon created an extensive list of reviews of obscure quirky films that he felt were underappreciated by the mainstream and then marketed it as the “Psychotronic Encyclopedia.”

Eye of the Goof hunted down "every film in the archive that also makes an appearance in Michael Weldon's essential guide to midnight movies."

Lots of free weekend fun there, going through the links list from The Amazing Mr. X to White Zombie