Bacteria use type VI secretion systems (T6SSs) to manipulate host cells during pathogenesis or to kill competing bacteria, which, in some cases, increases horizontal gene transfer.

Vis – A vi-like editor based on Plan 9's structural regular expressions

Better Vi Mode in Zshell

Vi is not vim

Wi-Vi, a system which uses low-power Wi-Fi signals and can track moving humans

Show HN: VisiData – vi for data

History of Emacs and vi Keys (2010)

Ultima VI

Shell from vi

Vip - Vi-Style Editor in #PicoLisp in 990 lines of code