On #Illumos, Jov vi is in /usr/src/cmd/vi: https://github.com/illumos/illumos-gate/tree/master/usr/src/cmd/vi On #OpenBSD, Bostic #nvi is in /usr/src/usr.bin/vi/vi; #NetBSD having it in /usr/src/external/bsd/nvi; and #FreeBSD in /usr/src/contrib/nvi: https://github.com/freebsd/freebsd-src/tree/main/contrib/nvi FreeBSD has an nvi2 in ports: https://freshports.org/editors/nvi2/ OpenBSD has elvis in ports: https://github.com/openbsd/ports/blob/master/editors/elvis/pkg/DESCR Ritter's Heirloom vi is on SourceForge: https://ex-vi.sourceforge.net STEVIE was posted to comp.sources.unix in 1988: https://sources.vsta.org/comp.sources.unix/volume15/stevie/ Unfortunately, Sven Guckes's vi Clones WWW site was never completed with some of this, notably lacking Heirloom vi, for example. https://guckes.net/vi/clones.html But it does mention oft-overlooked commercial clones such as Watcom's vi, a from-scratch implementation started in 1983 that is also now source-available: https://github.com/open-watcom/owp4v1copy/tree/master/bld/vi #vi #retrocomputing #ComputerHistory #STEVIE #elvis #VIM #NeoVIM #Watcom #OpenWatcom