Ligature is smart wiki software. While other wiki programs need you to tell them where to put a link, Ligature looks at the words you've used in the article, finds out if there's an article dealing with that word, and then links to it with no effort on your part. Ligature is ideal for making medium-sized wikis that don't need to be edited by many people. It's also ideal as a digital approximation of index cards, or as story-telling software for inter-connected stories.