launch-mode is a major mode for editing launch file(ROS). launch-mode is free software, licensed under the GNU GPL.
The latest stable version is euslisp-mode 0.0.1, released on August 24, 2016.
Make sure to place launch-mode.el somewhere in the load-path and add the following lines to your .emacs file to associate markdown-mode with .text, .markdown, and .md files:
(require 'launch-mode)