When comparing NoMachine vs mRemoteNG, the Slant community recommends NoMachine for most people. In the question“What are the best Remote Desktop tools for Windows?” NoMachine is ranked 3rd while mRemoteNG is ranked 14th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro It's free
Open source.
Pro Import/Export feature
Allows to share connections.
Pro Can open multiple sessions in different tabs
Pro Connection manager
Lets you organize your connections into folders with icons as well and allows nested folders as well.
Pro Supports multiple protocols
RDP (Remote Desktop/Terminal Server)
VNC (Virtual Network Computing)
ICA (Citrix Independent Computing Architecture)
SSH (Secure Shell)
Telnet (TELecommunication NETwork)
HTTP/HTTPS (Hypertext Transfer Protocol)
rlogin
Raw Socket Connections
Pro Inheritance from folder properties
Inheritance makes it possible to store properties on folder basis and let the underlying connections inherit this info.
Cons
Con Private keys needs to be managed on PuTTY
Since mRemoteNG is integrated with PuTTY (included in the installation), all private key needs to be configured on PuTTY itself and then the PuTTY session needs to be selected on mRemoteNG.