Added ThinkUp.

README.md

@@ -65,7 +65,7 @@ Table of Contents
   * [Mint](http://haveamint.com/) `⊘ Proprietary` - Extensible self-hosted web analytics, license costs $30 per site. ([Demo](http://mimeoverse.com/mint/)) `PHP`
   * [Open Web Analytics](http://www.openwebanalytics.com/) - Google Analytics and Piwik alternative - `GPL` `PHP`
   * [Piwik](https://piwik.org/) - Leading open-source analytics platform that gives you more than just powerful analytics. - `GPLv3` `PHP`
-
+  * [ThinkUp](https://github.com/ThinkUpLLC/ThinkUp) - Insights into your social networking activity on Twitter, Facebook, Instagram, and beyond. Also available as a [hosted service](https://www.thinkup.com/). - `GPL` `PHP`
 
 ## Automation