Dungeon Strikes Back (DSB) is a LUA scriptable clone of Dungeon Master and Chaos Strikes Back under development by Sophia. It uses the same graphics as the original games.
There is a dedicated discussion forum for this clone on Cowsmanaut's Dungeon Master Forums.
You can visit the Dungeon Strikes Back web site.
You can download the original dungeons of Dungeon Master and Chaos Strikes Back recreated for DSB at Joramund's files for Dungeon Strikes Back.