Sublime manual page syntax
Sublime text 3 syntax highlighting for man pages supporting different *roff (example of *roff: roff, groff, nroff and etc)
Installation:
Copy man.sublime-syntax
into path/to/subl-text-3/Data/Packages/User
folder
For example here is the path to sublime text folder in my Linux: ~/.config/sublime-text-3/Packages/User
Screenshot: