Gfarm is a distributed filesystem, generally used for large scale cluster computing. It's implemented in userland, and can be mounted by FUSE. It utilizes locality of a file to access a data node, and supports Globus GSI for Wide Area Network. Users can explicitly control file replica location on Gfarm. Gfarm can be used as an alternative storage system to HDFS for Hadoop, Samba, MPI-IO, and GridFTP. Monitoring via ZABBIX and Ganglia is also supported.
Monitoring::Spooler is a handy queue manager for queueing and delivery of monitoring notifications. It is able to handle several groups of on-call personnel and provides an extensible plugin mechanism to connect it to virtually any remote service which provides some kind of API. It is designed to work nicely with App::Standby.
RealOpInsight is an advanced business service monitoring dashboard toolkit for Nagios, Zabbix, Zenoss, Icinga, and other common monitoring systems including GroundWork, Centreon, Shinken, and op5 Monitor. It provides features for effective monitoring in demanding operations such as clouds, network operations centers, and large data centers.
Zabbix/J is a framework for integrating Zabbix monitoring into Java applications. Zabbix is an "enterprise-class Open Source distributed monitoring solution" which provides telemetry and triggers across entire infrastructures. Zabbix/J makes it simple to expose metrics from your Java applications, giving them visibility as first class citizens in a Zabbix configuration.
Zorka is a sophisticated programmable profiling/monitoring agent for Java suitable for running with production applications. The agent integrates seamlessly with popular monitoring systems and protocols (Zabbix, Nagios, syslog, SNMP) and offers additional tracing/profiling capabilities that - along with the accompanying data collector - help with spotting performance issues and general problems. The agent also exposes JMX data to conventional monitoring systems. Platforms (more or less) supported out of the box include: JBoss 4/5/6/7, Wildfly 8, Tomcat 6/7/8, Jetty 6/7/8/9, Websphere, Weblogic, GlassFish 4.0, WSO2 ESB, Mule ESB, and Jasig CAS. There is also dedicated support for the popular Java libraries Spring, Quartz, CXF, and Axis 1.x. The agent should run on most other platforms with limited functionalities (that is, lack of support for platform-specific features). It works with JDK6, JDK7, and JDK8. JDK5 support is also possible after preprocessing the agent binary with retrotranslator. Functionality can be easily added by implementing simple BSH scripts.