MESSUI is an integrated frontend of MESS, which itself emulates 100 of computers & consoles. MESSUI is similar in appearance to MAMEUI. Each emulation instance is accompanied by a windows-style menubar. This menubar is known as 'NEWUI'.

Steem SSE is a new version of Steem based on that source release. It incorporates new features and emulation improvements, some of them based on the Hatari  and SainT emulators (this "emulation" goes both ways), some on various internet discussions technical documentation, like chip datasheets, and  tests on real hardware. Steem SSE aims to be the #1 STF/STE emulator. There's no limitation in the original Steem code structure (in C++) that would make that goal unreachable. 'SSE' stands for 'Steven Seagal Edition'. Steven Seagal is a well known Aikido grandmaster, action movie star, musician and playboy. It is rumoured he has a shadowy past working for some secret agencies.  

SpeedVicio released another test version of the overlay MedGUI - a very convenient interface for multiemulator Mednafen , which in itself is not very friendly to setup. Reborn version of the application is completely modified compared to the normal MedGUI.