uProxy - Internet without borders. A safer path to Internet.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Gravity scan - Free malware and vulnerability scanner
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.
Marshal - Quickly scan your cloud for exposed sensitive information.
Prometheus - An open-source systems monitoring and alerting toolkit.