In 2012, he travelled to France and bought me a beer to thank me for my work on Org-Mode, and it was great. He was enthusiastic about this worldwide half-random connections, and insisted on how great it was to be able to connect with everyone in this way... we certainly miss him and that spirit.
He contributed to GNU Emacs Org-Mode with gnugol: https://list.orgmode.org/[email protected]/