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.
You may want to check out more software, such as RAFT, Engineering Raft or XP-Rafts, which might be related to Rafter+.