Thanks Simon for the heads up on these.

Seven Samurai (Shichinin no samurai) - Undated, unspecified draft script by Akira Kurosawa & Shinobu Hashimoto & Hideo Oguni. (Translated by Donald Richie) – hosted by: My PDF Scripts – in pdf format

A veteran samurai, who has fallen on hard times, answers a village’s request for protection from bandits. He gathers 6 other samurai to help him, and they teach the townspeople how to defend themselves, and they supply the samurai with three small meals a day. The film culminates in a giant battle when 40 bandits attack the village.

Information courtesy of imdb.com
The Box - September 30, 2006 draft script by Richard Kelly (based on the short story “Button, Button” by Richard Matheson – hosted by: The Script Collector – in pdf format

Norma and Arthur Lewis, a suburban couple with a young child, receive a simple wooden box as a gift, which bears fatal and irrevocable consequences. A mysterious stranger, delivers the message that the box promises to bestow upon its owner $1 million with the press of a button. But, pressing this button will simultaneously cause the death of another human being somewhere in the world; someone they don’t know. With just 24 hours to have the box in their possession, Norma and Arthur find themselves in the cross-hairs of a startling moral dilemma and must face the true nature of their humanity.

Information courtesy of imdb.com
The Men Who Stare At Goats - March 20, 2006 first draft script by Peter Straughan (based on the book my Jon Ronson) – hosted by: The Script Collector – in pdf format

A reporter, trying to lose himself in the romance of war after his marriage fails, gets more than he bargains for when he meets a special forces agent who reveals the existence of a secret, psychic military unit whose goal is to end war as we know it. The founder of the unit has gone missing and the trail leads to another psychic soldier who has distorted the mission to serve his own ends.

Information courtesy of imdb.com

There are more scripts on the Movie Scripts page.