The only one I've seen is Star Crash, a cheap Star Wars ripoff in which the special effects were done for $50,000. It's awesomely awful, though. The acting is terrible, the script is hackneyed, the effects are repeated over and over again, there is a mention of "computer waves", and David Hasselhoff plays one of the main characters. Plus, there is some wonderfully quotable dialogue.
"Imperial Battleship, halt the flow of time!"
"Imperial Battleship, halt the flow of time!"