WWII DBA is a set of free wargames rules for WWII Games based on the tried and true DBA mechanisms.
Mighty DBX Empires is a DBA variant for Games Workshop’s Might Empires rules.
De Bellis Navalibis is a set of free wargames rules for playing ancients naval wargames.
Damond Crump offers a WWII Variant for DBA.
De Bellis Indica is a DBA variant for warfare in India in the 18th and 19th Centuries.