TigerVNC

TigerVNC is an advanced VNC implementation, which includes features from TightVNC and TurboVNC (accelerated JPEG compression...).

See the reference side-by-side comparison Compare free remote desktop software

	TigerVNC
Website	https://tigervnc.org/
Pricing	Free (GPL)
Server platforms
Windows	Yes
Mac OS	Yes
Linux	Yes
Client platforms
Windows as client	Yes
Mac OS as client	Yes
Linux as client	Yes
iOS client
Android client
Features
File transfer	No
Audio support	No
Multiple sessions	Yes
Seamless window	No
Remote Assistance	No
Access Permission Request	No
Communication
Built-in Encryption	Yes SSL, TLS
Client/server/listening	Client & Server
NAT Passthrough	Yes using Listening mode
IPv6 support	Yes
Maximum simultaneous connections	Unlimited
Additional
Website	https://tigervnc.org/