
Cemetechian MateoConLechuga and his team Jacobly, Adriweb, Lionel Debroux, Vogtinator have been working on a portable and open source TI-84 Plus CE/TI-83 Premium CE emulator – CEmu , that is available on Github:
Features
- Portable emulation core written in C
- Decent emulation accuracy yielding the ability to boot all of TI’s CE OS’s, browse around, execute self test successfully, and run programs
- Portable GUI written in C++ using Qt (making it run on Windows, Mac OS X, Linux, Android, and iOS!
- Docks/Tabs-based graphical UI (which you are able to customize)
- Integrated setup wizard with ROM dumper for your calculator (there’s another one in TILP beta)
- Simple debugger (read CPU registers, flags, ASIC state) and port monitor/writer
- Animated (GIF) and still (PNG) screenshots
More info at Cemetech forum.

Looks tasty. But so far there are no binaries available, so yo have to install the Qt5 SDK and build it from source. But that’s not too difficult.