Remote desktop for Mac ?.....

Hello,

I am NEW to the Mac and OS-X

I come from an MS-Windows backgound and UNIX Backgound.

I have worked with telnet, console, xhosts, Micorsoft remote desktop, SMS, Team Viewer, Exceed, and many other remote desktop applications.

My question is:

Is there a native remote desktop app built-in to OS-X?...

If not what is the best app for remote desktop on a Mac?

Can you xhosts into a Mac ?....

Which of the above listed apps work for for remote desktop into a Mac ?....

-Thanks in advanced.