Rafter+ 1.1 can be downloaded from our website for free. This software is an intellectual property of AGA-CAD. The following version: 1.1 is the most frequently downloaded one by the program users. The program lies within Photo & Graphics Tools, more precisely Viewers & Editors.
From the developer:
Rafter application for Revit® Architecture and Revit® Structure provides a set of intuitive tools for roof wood framing. It allows easy to complete the framing of any roof shape.
Rafter application provides the set of tools for roof wood framing and elements scheduling. Work is based on the final 3D roof model. Common rafter systems (incl. jack rafters) for the selected roof are automatically generated on all slopes.
You may want to check out more software, such as RAFT, XP-Rafts or Easy Rafters, which might be related to Rafter+.