Script-o-Rama.com: An impressive collection of film script in different versions. Click on the film title and the full text of the film script comes up. There are two different types of scripts on the page: (1) The transcript, which means some person toiled for hours copying down every word to a movie; (2) the script and drafts, which is a copy of an actual script at some stage. Next to the script type, is the file size, which is self-explanatory. And then after that is the location of the site that is housing the script.
ScriptCrawler.net: Advanced script search engine that links to thousands of screenplays, teleplays, radio scripts, and stage plays. A great resource for screenwriters, and a fun site for movie fans.