Different Sources of Taking Remote Access....

Ajax VNC – Clientless VNC solution in the web’s favorite programming language.
Apple Remote Desktop – Apple’s jumped on the remote desktop bandwagon with this great VNC server built right into OS X.
Chicken of the VNC – One of the most popular VNC clients for OS X under the GPL.
DirectVNC – UNIX client using the framebuffer device via DirectFB.
FVNC – Great VNC client written in Flash. That’s right, Flash.
MetaVNC – This unique client/server package merges the host and remote desktops together into one Windows() or Linux() desktop.
.NET VNC Viewer – C# viewer that works with Windows and Windows Mobile/CE devices.
PowerVNC – Java-based client with support for SSH and SFTP.
RealVNC – Server/client from the original VNC developers.
sVNC – The perfect tool for offering remote assistance to Mac users, since there’s barely any configuring required.
SymVNC – Symbian phone client for connecting to your PC.
TightVNC – Popular VNC server/client with nice Java applet.
TurboVNC – TightVNC spinoff with great support for 3D apps.
UltraVNC – Wildly popular client/server app with file transfer, video drivers, chat, and much more.
Vine Server – OS X server with clipboard sharing, port changing, and a universal binary.
VncViewer for 8086 – Got an old IBM running FreeDOS or DOS? Put it to work with this VNC client.
VNCViewer for PocketPC – Client for, you guessed it, PocketPC users.
x11vnc – Unlike most other VNC servers for UNIX and Linux, this server lets you share your current desktop session (instead of a separate session).
NX

FreeNX – Open source server using the libraries from NoMachine.
NoMachine NX Client – Free client to connect to NX machines.
NoMachine NX Free Edition – NX server for UNIX/Linux.
NoMachine NX Enterprise Desktop – Server that includes everything that the free edition has, but with unlimited users (unlike the free version’s two).
NoMachine NX Small Business Server – NX server targeting small businesses.
NoMachine NX Enterprise Server – NX Server with unlimited users and unlimited connections.
NoMachine NX Advanced Server Subscription – Everything that the Enterprise server has, plus multi-node capabilities.
Remote Desktop Protocol

CoRD – Remote() desktop client for Mac OS X users.
grdestkop – Gnome wrapper for the rdesktop application.
krdesktop – rdesktop frontend written in KDE.
properJavaRDP – Cross-platform Java client based on rdesktop.
rdesktop – Extremely powerful command-line client for UNIX/Linux.
Remote Desktop – Microsoft’s official server, for XP Pro and Vista & WIndows 7
xrdp – Serves an X window session to incoming Windows clients.
Cross-Protocol

Connection Manager – VNC, RDP, and Telnet manager for UNIX/Linux distros.
KDE Desktop Sharing – The official KDE VNC server package.
KDE Remote Desktop Connection – The official KDE client for RDP and VNC.
Kurd – Great rdesktop/vncviewer frontend for KDE.
mRemote – Manage VNC and RDP connections on Windows with this handy app.
RDPMan – A little utility to manage RDP, VNC, and Telnet connections for Windows.
CrossLoop – Easy-to-use remote access utility with file sharing and a multilingual interface.
GoToMyPC – Extremely popular remote access program for ~$25/month.
LogMeIn – Remote access app with a free and a pro ($12.95/month) version with file transfer, remote printing, and more.
Unyte – Nice remote desktop server with a Java applet viewer and IM integration.