Bash Editor is a plugin for eclipse to edit bash scripts (.sh)
More information can be found inside Wiki and integrated Eclipse help (preview at https://rawgit.com/de-jcup/eclipse-bash-editor/master/basheditor-plugin/html/toc.html ).
You can find this plugin at https://marketplace.eclipse.org/content/bash-editor
To change what words are to be highlighted, check inside
Bash Editor is under Apache 2.0 license (http://www.apache.org/licenses/LICENSE-2.0)