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.
ProtonVPN - ProtonVPN is a security focused FREE VPN service, developed by CERN and MIT scientists. Use the web anonymously, unblock websites & encrypt your connection.
AppDynamics - Get real-time insight from your apps using Application Performance Management—how they’re being used, how they’re performing, where they need help.
OpenVPN - OpenVPN - The Open Source VPN
Zabbix - Track, record, alert and visualize performance and availability of IT resources
TunnelBear - Really simple VPN to browse the web privately & anonymously.