DOSBox
Frontends
DOSBox SVN Daum
This is an enhanced version of DOSBox by ykhwong, with support for Direct3D and HLSL shaders, Glide, ethernet, and many other features not found in the official version. Unlike vanilla DOSBox, it has a menu for on-the-fly configuration.
D-Fend Reloaded
Description here.
DOSBox Game Loader
Description here.