Roger S. H. Schulman is a veteran screenwriter of features, TV series and MOWs. He is the recipient of an Academy Award nomination and British Academy Award for "Shrek," an Emmy nomination for "JONAS," as well as numerous other awards for screenwriting. A former journalist for Newsweek and BusinessWeek, Schulman enjoys writing for children, adults, and swings between projects of fantasy and those based on real-life people and pursuits. He has created, developed and run several TV shows, enabling him to carry his or another creator's vision from inception to screen, on time and under budget.
If you're using OS X and don't want to rely on app on the Web, consider the latest version of Daylite. I don't like that it requires a server in order to sync to multiple users and iOS devices, but it stands alone in desktop apps for versatility and the latest version is quite attractive. It's not cheap, but it has no ongoing expense.