Merge pull request #45 from tricoder42/patch-1

Added Pingdom to Monitoring section

Author: ericelliott

README.md

@@ -220,6 +220,7 @@ Some of these links are affiliate links, meaning that if you make a purchase, I
 ## QA / Deployment / Monitoring / CI
 
 * [PM2](https://github.com/Unitech/pm2) Process monitoring / self repair
+* [Pingdom](https://www.pingdom.com) Response monitoring and alert management (because incidents happen).
 * [New Relic](http://newrelic.com/) Deep insights into the performance and health of your production apps
 * [Sauce Labs](https://saucelabs.com/) Cross platform web application testing with great collaboration and integration support
 * [Travis CI](https://travis-ci.org/) CI, of course