YeahSo SupportAndHanger

"YeahSo SupportAndHanger tool provides you a quick and easy way to layout supports and hangers. It applies to all MEP curves including pipe, duct, cable tray and conduit.  It has following features:

1. Support all MEP curves (Pipe/Duct/Cable Tray/Conduit)
2. Manual layout support or hanger
3. Delete support and hanger on selected MEP curves
4. Split MEP curves for a fixed length
5. Support to use customized support or hanger
6. Automatically layout support or hanger
7. Support two methods of auto layout
8. Support position update when host curve moves
9. Support elevation update when host elevation changes
10. Support geometry update when host size changes

"The first five functions are free, and the last five need to purchase a license. However they are all available during the trial period which is 30 days after you install."

There's more information available on the Autodesk Exchange | Apps website.