This plugin implements the external editor API provided by Tabletop Simulator to allow use of Sublime Text 3 as the Lua editor.
Create the appropriate folder and put the contents of the repository in it.
%APPDATA%\Sublime Text 3\Packages\Tabletop Simulator\
~/.config/sublime-text-3/Packages/Tabletop Simulator/
~/Library/Application Support/Sublime Text 3/Packages/Tabletop Simulator/
You can quickly locate the Packages folder by opening Sublime and clicking
Preferences -> Browse Packages...
Tools -> Tabletop Simulator -> Get Scripts
) or open a particular object's script by right-clicking it in
Tabletop Simulator and choosing Scripting -> Lua editor
Tools -> Tabletop Simulator -> Send Scripts