ElasticHQ - Tool for ElasticSearch management and monitoring.
Grafana - Data visualization & Monitoring with support for Graphite, InfluxDB, Prometheus, Elasticsearch and many more databases
elasticsearch-gui - AngularJS Client for ElasticSearch as a plugin.
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
LogFusion - Log fusion is a software that helps you to display and monitor your log files in real-time by relying on this lightweight application that features a massive range of useful function.
Prometheus - An open-source systems monitoring and alerting toolkit.