Add Glowroot, update Kamon url

vedenin1980 · vedenin1980 · commit e1d2b66f6ca4 · 2019-03-28T11:11:48.000+01:00
diff --git a/readme.md b/readme.md
@@ -1124,7 +1124,8 @@ Teamware, ClearCase, Perforce, Monotone and Bazaar. License: [CDDL 1.0](http://o
 1.  [AppDynamics](https://www.appdynamics.com/) - Commercial performance monitor.  **License: proprietary** ![proprietary license](https://github.com/Vedenin/useful-java-links/blob/master/img/proprietary-license.png?raw=true)
 1.  [JavaMelody](https://github.com/javamelody/javamelody) - Performance monitoring and profiling. License: [Apache 2](http://www.apache.org/licenses/LICENSE-2.0). ![business friendly license](https://github.com/Vedenin/useful-java-links/blob/master/img/business-friendly.png?raw=true)
 1.  [jmxtrans](https://github.com/jmxtrans/jmxtrans/) - Tool to connect to multiple JVMs and to query them for their attributes via JMX. Its query language is based on JSON, which allows non-Java programmers to access the JVMs attributes. Likewise, this tool supports different output writes, including Graphite, Ganglia, StatsD, among others. License: [MIT](https://opensource.org/licenses/MIT). ![business friendly license](https://github.com/Vedenin/useful-java-links/blob/master/img/business-friendly.png?raw=true)
-1.  [Kamon](http://www.kamon.io/) - Tool for monitoring applications running on the JVM. License: [Apache 2](http://www.apache.org/licenses/LICENSE-2.0). ![business friendly license](https://github.com/Vedenin/useful-java-links/blob/master/img/business-friendly.png?raw=true)
+1.  [Kamon](https://www.kamon.io/) - Tool for monitoring applications running on the JVM. License: [Apache 2](http://www.apache.org/licenses/LICENSE-2.0). ![business friendly license](https://github.com/Vedenin/useful-java-links/blob/master/img/business-friendly.png?raw=true)
+1.  [Glowroot](https://glowroot.org/) - Open source Java APM. License: [Apache 2](http://www.apache.org/licenses/LICENSE-2.0). ![business friendly license](https://github.com/Vedenin/useful-java-links/blob/master/img/business-friendly.png?raw=true)
 1.  [New Relic](http://newrelic.com/) - Commercial performance monitor. **License: proprietary** ![proprietary license](https://github.com/Vedenin/useful-java-links/blob/master/img/proprietary-license.png?raw=true)
 1.  [SPM](https://sematext.com/spm/) - Commercial performance monitor with distributing transaction tracing for JVM apps.  **License: proprietary**![proprietary license](https://github.com/Vedenin/useful-java-links/blob/master/img/proprietary-license.png?raw=true)
 1.  [OverOps](https://www.overops.com/) - Root cause automation in production.  **License: proprietary** ![proprietary license](https://github.com/Vedenin/useful-java-links/blob/master/img/proprietary-license.png?raw=true)
