A KeYmaeraX syntax definition for the Sublime Text 3 editor. It needs the latest version of Sublime Text 3 ( > build 3084).
This package is still very new, so contributions and bug reports are very welcome.
The package is not yet available via the Sublime Text package control.
To install, just put the KeYmaeraX.sublime-syntax file into your Packages/User directory, which can be found via Preferences | Browse Packages. (It is usually ~/Library/Application\ Support/Sublime\ Text\ 3/Packages/User).
Then restart Sublime Text.