We've recently run into the question of whether we should allow nagware here at PortableApps.com. Nagware are apps that are free but will nag you about registering or purchasing the full version at every launch. We're not talking about a single entry in a menu with a link to the professional version, but a nag that you have to dismiss over and over.
Specifically, we're talking about Screenshot Captor, which will show you a registration nag screen on every launch and then a second nag screen popup as the app launches every time. Your choices to get rid of these are (1) to register for free on the site with your email and get a 6 months temporary key (after which you can come back and get a 2nd 6 month temporary key, and then after a year come back again to get a permanent one); (2) to register for free on the site anonymously and get a 60 day temporary key (renewable every 60 days, never permanent); or (3) make a donation and get a lifetime permanent key.
We don't currently have any nagware apps in our directory, so what say you all on the possibility of including them? Options could include (1) listing them with a small note on their app pages, (2) listing them with a specific tag so users can exclude them from their platform app directories, (2a) the same but hidden by default, (3) not permitting nagware.