What is it?

First Age Angband.  It’s a roguelike game, a variant of Oangband, which in turn is a variant of Angband.

Where do I get it?

Right here!  The latest version, FAangband 0.3.5 is available compiled for Windows, WindowsCE, Nintendo DS and Macintosh OSX, or as source code.

Is there anything like it?

Yes.  Here are some links.

Is that it?

No!  There are big plans for the future of FAangband.  Look at the FA development thread on the Angband forums.