I was doing a comparison of a few different open source content management tools when I came across this little gem as a plugin for Confluence.
It’s called Gliffy and is an online diagram drawing tool. Free version allows you to share 5 drawings with other users.
The beauty was having it in the wiki environment and it following the wiki way of being able to edit content on the fly. No longer is this just the realm of text. Now we can be modifying diagrams as well.