Sega

Sega Master System

GENPlusDroid

GENPlusDroid is an open source Sega Genesis emulator powered by GENPlus. Runs Sega Master System and Sega Mega Drive games. High compatibility, games like Virtual Racing and Phantasy Star work full speed. Devices with a good GPU can use shaders to increase the graphic quality. GENPlus is free, ad supported (only in the main menu).

MasterGear

MasterGear emulates Sega MasterSystem, Sega GameGear, and other classic 8bit consoles from Sega. It runs MasterSystem and GameGear games right on your Android phone or tablet. Save game progress at any time and share it with friends, or play games together on the network.

Sega Genesis – Mega drive

AndroGens

AndroGens is an Megadrive / Genesis emulator for Android. It provides high game compatibility, xpreia play support, save states, support for 3rd party physical controllers and much more. This version is ad supported, but paid add-less version is also available here.

Sega CD

MD.emu

Sega Genesis/Mega Drive, Sega CD, and Master System/Mark III emulator based on portions of Genesis Plus/Gens/Picodrive (GPL), designed and tested on the original Droid/Milestone, Xoom, Galaxy S2, Nexus 7, and Xperia Play, but works on many devices with similar specs. MD.emu features accurate emulation is able to properly display graphics in game such as Panorama Cotton, Star Control, and the VS mode in Sonic 2. Sega CD support is currently considered beta, but its getting there.