Which diagramming apps are the best for use in Atlassian’s Confluence and Jira?
Well, that’s really up to your needs, but take a look at this blog post The Best Diagramming apps: Blended Perspective’s Opinion and learn some more about draw.io.
Related blog post: draw.io vs Gliffy: starting a new business, all you need to know
Fore more general info on draw.io for Confluence or Jira, please refer to our draw.io webpage.
And some more great blogposts! Blog - draw.io