“Research & organize your family tree together”

Features - Gramps Web
https://www.grampsweb.org/

“I read once that Cray's C compiler (presumably for either the X/MP or Y/MP) kept activation records on a linked list because there was no hardware stack.”

Reddit - Dive into anything
https://www.reddit.com/r/C_Programming/comments/16z7yn9/c_language_without_a_hardware_stack/