The viewer can also open MS Project files (*.mpp, *.mpx, *.xml)....
We do not have a download file for the latest version (4.10), but you can try downloading it from the developer's site
Download version 3.1 from the developer's website
Version: 3.1
Date update: Jul 31, 2010
File name: RationalPlan-Viewer-3.17.1.dmg
Size: 83.5 MB

Latest versions of RationalPlan-Viewer

3.1
Jul 31, 2010
RationalPlan-Viewer-3.17.1.dmg

Alternative apps

Project Viewer 365
Project Viewer 365
rating

View Microsoft Office project plans from your Mac.

Video Viewer
Video Viewer
rating

View live video content from connected FireWire, USB cameras and other devices.

Firestorm Viewer
Firestorm Viewer
rating

Firestorm is the next generation viewer for Second Life produced by us

WMF Viewer
WMF Viewer
rating

An easy-to-use application designed to open, view and convert WMF files.

Viewer Builder
Viewer Builder
FREE
rating

Create viewer apps for single-folio, multi-folio, and subscription viewer apps.