Cyberboard

Cyberboard is a Windows game engine, created by Dale Larson, for building and playing online adaptations of board games and wargames via Play By EMail (PBEM). Though not free-ware, it is currently free for personal use.

The files that are created/used for each individual game title are known as 'gameboxes'.

Cyberboard is very popular amongst wargamers for PBEM and, of all the games engines, has the greatest number of  games supported om Limey Yank Games (it was, afterall, the system that LYG was originally setup to support). Creating 'gameboxes' is more involved than for ZunTzu, but less technical than for Vassal.

Download the software from the Cyberboard website.

Private Wars provides useful documentation on creating gameboxes and playing with Cyberboard.