Vitaly Kovalyshyn

mono

DEPRECATED; Mono is an open source implementation of Microsoft's .NET Framework

haproxy

HAProxy - The Reliable, High Performance TCP/HTTP Load Balancer

elasticsearch

Elasticsearch is a powerful open source search and analytics engine that makes data easy to explore.

logstash

Logstash is a tool for managing events and logs.

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kibana

Kibana gives shape to any kind of data — structured and unstructured — indexed in Elasticsearch.