DBGL - DBGL is a free, open source, multiple frontends for DOSBox.
LaunchBox - LaunchBox is a portable, box-art-based games database and launcher for DOSBox, emulators, arcade cabinets, and PC Games. Download it free!
RetriX - RetriX is an emulator front end for UWP, on all the hardware platforms it supports: it serves the...
GameEx - GameEx is considered to be the most powerful and feature rich front-end for MAME, GameBase, Daphne, PC Games and all command line based game emulators, along with being a complete Home Theatre PC solution.
Terminal Launch V - For those that want a clean, simple fast emu frontend.
GamersGate - Buy and download games instantly for PC and Mac.