Update README.md

Author: dheid

README.md

@@ -714,6 +714,7 @@ provide tests for your changes. We use JUnit 5 for testing. Coverage should be a
 
 ## Other Java Matomo Tracker Implementations
 
+* [The original Piwik Java Tracker Implementation](https://github.com/summitsystemsinc/piwik-java-tracking)
 * [Matomo SDK for Android](https://github.com/matomo-org/matomo-sdk-android)
 * [Piwik SDK Android]( https://github.com/lkogler/piwik-sdk-android)
 * [piwik-tracking](https://github.com/ralscha/piwik-tracking)