If you're system administrator, who use Linux as Desktop. You surely want to check out Remmina – The GTK+ Remote Desktop Client.
As far as I tested among all VNC Linux clients I know Remmina is definitely the one of choice in terms of Interface simplicity / stability and remote connection level of responsibility.
Before finding out about Remmina existence, I tried xtightvncviewer, xvnc4viewer, gvncviewer, gtkvncviewer. xtightvncviewer, xvncviewer and gvncviewer are more for console geeks and hence either they lack GUI interface or user interface looks terrible.
GTKVncViewer's interface is also not bad but still not ÑÐ¾ nice as Remmina's.
As you see in above shot, gtkvncviewer lacks any configuration. The only thing it can do is connect to remote host and you have option to configure nothing related how remote connection will respond, what type of Resolution to use etc.
I know of of no other Linux VNC Clients that has configurability and GUI interface of Remmina.
As of time of writting Remmina is at stable version 1.0 and supports following Remote connection protocols:
Remmina is available across mostly all Linux mainstream distributions:
To install Remmina on Debian / Ubuntu and deb derivatives:
debian:~# apt-get –yes install remmina
On Redhats (Fedora, CentOS, RHEL – RPM based Linuxes) install via:
[root@centos ~]# yum –yes install remmina
Below are few screenshots of Remmina: