XBoard GUI
XBoard is a free software on Unix/Linux os, it is just a GUI and it support more thousand engines, in Win Os you can download winboard.
You can get XBoard on here
You can read Online User Guide here
And any questions could be asked on Winboard Forum
the lastest version is 4.6.x but it often aborted when use GnuChess engine. So I select XBoard 4.4.4 then it works will. XBoard always doesn't work with its fairy engine, I replace it by GnuChess 6 engine, it can be download here. To make it work you can use
xboard -fcp "gnuchess xboard"
Engine
Before run xboard you must get an engine to support it, I use GnuChess 6.
You can find a list of engines on here
More
You can rezie the board with xboard -size medium