Vague:
http://www.wheresthedrama.com/plot3.htm - The 12 Basic Plots

Vague Generators:
http://bonnieneubauer.com/storyspinner.shtml - Story Spinner: Setting, Starting phrase, & Four elements http://www.seventhsanctum.com/generate.php?Genname=quickstory Quick Story Idea Generator: The theme, The main character, The start, & The end

Specific:
http://lemmasoft.renai.us/forums/viewtopic.php?f=4&t=2257 - Lemmasoft VN Ideas Dump
http://www.writepop.com/category/1001-story-ideas - 1001 Science Fiction Story Ideas
http://www.angelfire.com/nc/tcrpress/plotbank.html - Story Bank

Creative Writing Now:
http://www.creative-writing-now.com/story-starters.html - All
http://www.creative-writing-now.com/ideas-for-stories.html - 12 “Three Elements”, 3 Character Ideas, 8 First Lines
http://www.creative-writing-now.com/short-story-ideas.html - 10 “Three Elements”, 34 Story Ideas
http://www.creative-writing-now.com/ideas-for-novels.html - 6 Character Desires, 20 Character’s, 10 Settings
http://www.creative-writing-now.com/free-writing-prompts.html - 10 Story Ideas
http://www.creative-writing-now.com/story-ideas.html- 12 Story Beginnings, 10 ‘What-if…’s
http://www.creative-writing-now.com/story-ideas-2.html- Prompts on False Appearances and Regrets
http://www.creative-writing-now.com/story-ideas-3.html - Story Starters on Major Life Changes
http://www.creative-writing-now.com/story-writing-ideas.html- 4 Story Ideas About Obsessions

Focus-Themed:
http://www.creative-writing-now.com/ideas-for-creative-writing.html - 8 story starters with a focus on: writing dialogue
http://www.creative-writing-now.com/creative-writing-topics.html - 6 story starters with a focus on: plot structure and story climax
http://www.creative-writing-now.com/fiction-writing-prompts.html - 8 creative writing ideas with a focus on: character development
http://www.creative-writing-now.com/story-prompts.html - 6 writing ideas with a focus on: showing versus telling, and specific detail