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Remote Desktop Connection Manager vs mRemoteNG: catalog facts
Remote Desktop Connection Manager	mRemoteNG
Free Free download from Microsoft Sysinternals.	Free Free and open source under the GPL.
Windows	Windows
Groups servers and connects to a whole group at once Live thumbnail view of many sessions	RDP, VNC, SSH, telnet, rlogin, raw sockets and HTTP in one tabbed window Folder tree with inherited settings, so a hundred servers stay manageable
Windows and RDP only Closed source	The last tagged stable release is 1.76 from 2019 Windows only
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.