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Link
RDP Full AdminFreeRDP
Websiterdpfulladmin.comfreerdp.com
Pricing9.99Free (Apache license)
Server platforms
WindowsYes
macOSYes
LinuxYes
Client platforms
Windows as clientYes
Mac OS as clientYes
Linux as clientYes
iOS clientYes
Android clientYes
Features
File transferYesYes
Audio supportYesYes
Text chatYes
Voice Chat / VoIPYes
Multiple sessionsYesYes
Seamless windowYesNo
Remote AssistanceYes
Access Permission RequestYes
Communication
Built-in EncryptionYesYes
Client/server/listeningFull AdminClient Only
NAT PassthroughYes
IPv6 supportYes
Maximum simultaneous connections2