Zabbix - Track, record, alert and visualize performance and availability of IT resources
ManageEngine RecoveryManager Plus - RecoveryManager Plus is one such enterprise backup solution which has the ability to easily backup and restores both the domain controllers and virtual machines.
openITCOCKPIT - openITCOCKPIT is a leading open source monitoring framework based on Naemon (Nagios). In addition it integrates Checkmk and Prometheus. It also offers interfaces to Icinga2, PRTG and opManager to obtain status and performance from them.
Lastpass - LastPass is an online password manager and form filler that makes web browsing easier and more secure.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
SECDO - SECDO offers automated endpoint security and incident response solutions