Decision trees are awesome. A simple device that helps you figure out what you need to do, or what a particular outcome might be, based on specific circumstances.
But decision trees are often static. What you really need is something more interactive - something you can embed on a website for clients/end users or internally in a knowledge base.
Decisions² helps you do just that. Create a decision-tree, add tooltips to help the user evaluate which option they should choose, customize the style to suit your requirements, then embed it on a webpage using an iFrame or simply copy and share the link.