JumpCloud - Cloud-based directory services. Alternative to Microsoft Active Directory.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
Microsoft Azure Active Directory - Azure Active Directory is a comprehensive identity and access management cloud solution that provides a robust set of capabilities to manage users and groups and help secure access to applications including Microsoft online services like Office 365 …
Zabbix - Track, record, alert and visualize performance and availability of IT resources
OneLogin - On-demand SSO, directory integration, user provisioning and more
Linux Dash - A drop-in, low-overhead monitoring web dashboard for a Linux machine.