Workout-Exercises.com

Creative Writing Exercises
Part of a book about spirituality. Chapter 4 is about creativity and has some writing exercises.
www.gla.ac.uk/

Single Word Story Prompts
Story prompts are what motivate a storyteller to write.
story_prompts.chenzirapublishing.com/

Hatch's Plot Bank
2300+ plot ideas for fiction and screen writers.
www.angelfire.com/

Tribe: Free Write
Free writing forum. Abstract comments and non sequiturs, or other stories that are triggered by what you read.
freewrite.tribe.net/

The Random Logline Generator
A customizable random generator of story scenerios, plots, and character names. For bored citizens, role-playing gamers, and mutant playwrites alike.
www.lifeformz.com/