HP SiteScope for system and apps monitoring (agentless)HP SiteScope
Here are 3 new free tools
System Process Visualizer: You can see the running processes and biggest consumers in the form of a word-cloud with updates every ten seconds. Visit the facebook page at https://www.facebook.com/SysPV to give your likes and comments.
Health Playback for Virtual Systems: Provides the history of VMs for the past week as a one minute video, enabling you to quickly spot patterns. https://www.facebook.com/HP4VS
Big Data Performance Visualization: Lets you visualize a Hadoop cluster and/or Vertica database performance through a continuously refreshing tree-map, so you can observe trends.