Here are links to articles written by ROMU Software that have been published in PBDJ and can be downloaded from here:
www.pbdr.com - the PowerBuilder developers resource with the best diff utility for PowerBuilder: PBDelta. It has been superseeded by ProDiff now.
www.ecrane.com - everyone knows PowerGen - a musthave for enterprise development in PowerBuilder.
Appeon drives Appeon PowerBuilder and strengthens the PowerBuilder community.