Create Your Screenplay : http://www.createyourscreenplay.com
Resources for screenwriters

CineStory : http://www.cinestory.com
Works with emerging screenwriters to hone their craft

Final Draft : http://www.finaldraft.com
The number-one selling screenwriting software program in the world

Hollywood Script Analysis : http://www.hollywoodscriptanalysis.com
Professional Coverage For Your Screenplay

IMSDb : http://imsdb.com
Movie Scripts free for reading and downloading

International Screenwriter's Association http://www.NetworkISA.org
Screenwriting Resources and FREE 'Writing Gigs' postings!

James Russell Publishing : http://www.powernet.net/~scrnplay
Writer resource links, sample author query letter and advice for authors and screenwriters

Screenplay : http://www.screenplay.com

Screenwriting.info: http://www.screenwriting.info/
How to Write a Screenplay

Screenwriters Utopia : http://www.screenwritersutopia.com/
screenplay writing and screenwriting elements on how to write a screenplay in proper format, classes

Script magazine: http://www.scriptmag.com
The premier magazine for the craft and business of screenwriting.

ScriptShark : http://scriptshark.com/
The first step to selling your screenplay or manuscript.

Scriptocinetv : http://www.scriptocinetv.com
Help for screenwriters and playwrights (in French).

Scriptofilm : http://www.scriptofilm.net
Getting writers in contact with publishers and producers (French/English)

Story Bay : http://www.Storybay.com
A community designed to help mentor writers and develop their work with the assistance of professionals (French/English)

The Spec Script Library : http://www.thesource.com.au/scripts/
Original scripts for TV and film.

The Story Coach : http://www.thestorycoach.com/
The industry's most innovative and immediately empowering resource
for story development, writing, screenwriting, filmmaking, and professional speaking.

The Writers Website : http://www.writerswebsite.com

Writers Guild of America East and West http://www.wga.org/ - http://www.wgaeast.org/

Labor unions representing film, television, radio, and new media writers.