Process Visualizer is a low cost program to build flow chart style documents which can be used to document business processes. The editor is is small, simple to use and easy to modify existing documents. Documents can also link to other documents which can be navigated to by double clicking the item.

There is also a Free app “Process Visualizer Document Viewer” that can be used to view the documents and easily share with co-workers for free.
https://www.microsoft.com/store/productId/9MSZW4HFCG75