I've been listening to David and Katie talk about PDF Pen Pro for a long time now - however being notoriously tight with my money, I've been waiting until they have had an offer on. Waiting. And waiting....
20% off of a purchase of PDF Pen or PDF Pen Pro is a good enough offer - HOWEVER, you also get a free licence to donate to the non-profit organisation of your choice!
So if you are a non-profit organisation, let me know and the first one to contact me, that is a legitimate non-profit organisation can have this licence.