Ooh, I have a list:

• Looker - directed by Michael "Jurassic Park" Chricton. The first ever film to create 3D shading with a computer that produced the first ever CGI human character was the model Cindy (Susan Dey).
• Westworld (1973) - also written by Michael Chricton
• Mac and Me - It's a movie that's SO UNBELIEVEABLY BAD IT MUST BE SEEN TO UNDERSTAND HOW BAD IT IS. After you watch it, you'll understand why Paul Rudd tortured Conan O'Brien with this famous clip.
• The Last Starfighter - another cheeseball 80s knock off of Star Wars. Also pioneered the use of CGI
• Enemy Mine - Dennis Quaid bonds with an alien enemy and eventually helps him bear children. Directed by Wolfgang 'Neverending Story' Petersen. You have been warned.
• The Quiet Earth - A scientist awakens to find himself alone in the world. In a desperate attempt to search for others, he finds only two who have their own agenda.
• The Stuff - A delicious, mysterious goo that oozes from the earth is marketed as the newest dessert sensation, but the tasty treat rots more than teeth when zombie-like snackers who only want to consume more of the strange substance at any cost begin infesting the world. Co-stars Paul "Goodfellas" Sorvino
• Miracle Mile - What would you do if you accidentally found out that the world was ending in a little over an hour? Features Anthony "ER" Edwards

Forbidden Planet, Logan's Run, Death Race 2000, The Day the Earth Stood Still, ...

What's your cutoff for "classic"? Are we talking about the classic film era, or anything older than 25 years?