There was a download of 3DFiBs Backgammon 5.0.49 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This program is a product of maareyes solomon. We recommend checking the downloaded files with any free antivirus. The software lies within Games, more precisely Board.
From the developer:
3DFiBs is a popular free client for fibs.com (first internet backgammon server) and it includes a gnubg powered world class offline computer player all packaged in a slick and smoothly animated interface for hours of backgammon fun
You may want to check out more software, such as Ariston Backgammon, Backgammon or Backgammon Buddy - Pogo, which might be similar to 3DFiBs Backgammon.
Board
Board