Ocean, Azure; - Containers: Docker, Docker Swarm, Kubernetes, Rancher, Tectonic, Openshift; - Virtualization: VMWare, MS Hyper-V, ESXi, KVM, oVirt, Openstack, Proxmox; - Monitoring: Zabbix, Nagios, Icinga, Collectd, Grafana, Graphite, Logstash, Kibana, Prometheus, Datadog, Sumo Logic; - Automation: Ansible, Terraform, Chef, Puppet; - Message brokers: RabbitMQ, Apache Kafka; - Continuous Integration: Jenkins; Gitlab CI; - Scripting: PowerShell, Bash, Python, CMD; - Databases: Microsoft SQL, MySQL, PostgreSQL, SQLite; - No-SQL: MongoDB, Redis, Memcache; - Search/IR systems: ElasticSearch, Solr - Web servers: IIS, Apache, nginx, Lighttpd; - Service discovery system: Zookeeper, etcd, Consul - Operating systems: CentOS, Debian, RedHat, Ubuntu, CoreOS, FreeBSD, Gentoo; - Project & Process Management: Jira, Asana, Basecamp, Redmine, Tuleap, Servicedesk