MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Percolator - Percolator: the always fun, supremely unique photo app that is sure to surprise you! FEATURES:
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.
Graylog - Graylog is an open source log management platform for collecting, indexing, and analyzing both structured and unstructured data.
Prometheus - An open-source systems monitoring and alerting toolkit.