Well you have the MS-DOS era Borland tools. Someone took the time to rewrite it as a cross-platform open source library: https://github.com/magiblot/tvision Edit: Not a rewrite, but a port. See comments below.
what i would like to see is a gui layer that wraps turbo vision such that i can have apps that work in the terminal and in a GUI. ideally so that the app binaries directly work in both without any recompile or change of code.