More info: https://bgammon.org
Source code:
https://bgammon.org is an AGPL-licensed online backgammon service.
This post was authored by EGYT, one of the community members who has translated the client into Ukrainian.
bgammon.org is a free and open source online backgammon service without ads. Registration is also optional.
Join the community at https://bgammon.org/community
There are two engines available to play against, tabula and wildbg. tabula is rated beginner to intermediate level, and wildbg is the highest rated player on the server currently.