Word Webs is a free site that generates connected webs based on the words you enter and select. Generate a web simply head to the site and enter a word. A web of six related words will be generated on the screen. Click on any of those six words to have another connected web created.
Word Webs also has a random word option. Select "random" from the drop-down menu at the top of the page and web will be created for a randomly chosen word. You can then click on the words in that web to generate more connected word webs.
Applications for Education
Word Webs could be a handy tool to use to generate some story starters. It might also be useful to help students come up with some different words to try in their Google or Bing searches.