ROGER.DENTON  We've recently released Pro 4 and you'll find a number of enhancements and improvements.

Beyond the Mac desktop we've also made significant improvements in the network infrastructure to our hosted project server (something you won't find anywhere else).

If you've downloaded the trial software in the past you might want to do so again as Pro 4 will give you another free trial period.  
(Version 4.0.3)

ROGER.DENTON  Hi,

Yes, that's correct. We note that in the description above - unfortunately it's past the point where the "More..." has to be clicked to see it.

Roger  
(Version 2.2)

ROGER.DENTON  OpenPlanning is completely free with no time limits.  
(Version 2.1.9)

ROGER.DENTON  The doc is indeed available on our web page and as part of the download image (Help->User Guide (pdf)).  
(Version 2.1.9)

ROGER.DENTON  Just to clear up any confusion created by the incorrect comments below.

SharedPlan OpenPlanning is completely free.

We do offer other products with limited time trials and purchase fees but, again, OpenPlanning is completely free with no time limit.  
(Version 2.1.9)