How are you all supporting and protecting your remote workforce now?

I'm sure most companies are working remotely now with the help of cloud apps - Slack, Zoom, Zoho, Microsoft Teams, etc . But, how are you all managing your IT infrastructure like servers, applications, databases, and network devices remotely? Suggestions for good tools please. Any companies offers free tools?

I saw a bunch of folks already offering free tools:

https://openforbusiness.org/

https://www.manageengine.com/secure-remote-access-software/

https://www.beyondtrust.com/remote-support

Any other free tools or suggestions out there? Please share your thoughts.