Zabbix - Track, record, alert and visualize performance and availability of IT resources
Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
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.
Fing - Discover which devices are connected to any Wi-Fi network, map devices, detect intruders, assess...
Lastpass - LastPass is an online password manager and form filler that makes web browsing easier and more secure.
SoftPerfect Network Scanner - Powerful multipurpose network administration tool for Windows and macOS