Ten Things to do During the Holidays
221B is an advergame to promote the new Sherlock Holmes movie. Looks like it might be fun, although it seems you have to be on Facebook to play it so I couldn't try it out.
Want to learn how to write a movie script treatment the easy way? Try Bill Myer's Automatic Movie Script Treatment Generator.
ArchteypeWriting.com has a trio of story-starter generators to play with: Character Generator, an Everyday Problems Generator, and a Plot Scenario Generator.
Play the online game Christmas Lights and listen to some holiday music while you try to spot all the differences (not as easy as it looks.)
All I can say about the Christmas Zoom Game is Whoa.
For a distraction-free writing environment, try Dark Room (OS: Windows XP/2000/2003) or Write Room (OS: Mac OS X 10.4 or later)
This Google Image Ripper over at Dear Computer pulls images based on the keyword(s) you put in.
OmmWriter is "a simple text processor that firmly believes in making writing a pleasure once again, vindicating the close relationship between writer and paper. The more intimate the relation, the smoother the flow of inspiration" (OS: Mac OS X 10.5 or higher)
Who is smarter, men or women? Trivial Pursuit has an online game that doubles as an experiment to find out.
If you're bored and want to get in a little writing practice without committing to a huge project, try putting together a scene or short story using prompts from Seventh Sanctum's Writing Challenge Generator.