Filemaker Pro
Used by 7 peopleclaris.com ↗

“To organize individual findings during the process of research, I use a FileMaker database.”
Megan Prelinger Interview, Writer, historian, librarian, naturalist · via Uses This 
“When working on a card game, I keep track of the cards using Filemaker Pro, one record per card, one DB per game.”
Steve Jackson Interview, Game designer · via Uses This