nxMakaqu is a merger between two engines for idSoftware's Quake: Fragger's Makaqu and BlackAura's nxQuake. This is now the definitive Quake engine for the Dreamcast. The features include SDL sound, support for CD audio, proper support for the official mission packs, an improved nxQuake modlist with fixed modlist scrolling and swap disc support for the modlist, multiple resolutions selectable in the modlist, VMU support for savegames, savestates and config files with independent VMU files for each game, and many other features too numerous to list.
For the complete list of features, and the download, check out this topic at the DCEmulation forums.