Added tslint-brunch to the list of 3rd party tools (palantir#4251)

docs/usage/third-party-tools/index.md

@@ -20,7 +20,8 @@ _Note: Most of these tools are not maintained by TSLint._
 * [tslint.tmbundle][17] ([TextMate][18])
 * [generator-tslint][19]
 * [Flycheck][20] ([Emacs][21])
-* [Gitpod][22]
+* [tslint-brunch][22] ([Brunch][23])
+* [Gitpod][24]
 
 
 [0]: https://github.com/palantir/grunt-tslint
@@ -45,4 +46,6 @@ _Note: Most of these tools are not maintained by TSLint._
 [19]: https://github.com/greybax/generator-tslint
 [20]: http://www.flycheck.org/
 [21]: https://www.gnu.org/software/emacs/
-[22]: https://gitpod.io
+[22]: https://www.npmjs.com/package/tslint-brunch
+[23]: https://brunch.io/
+[24]: https://gitpod.io