FX-ES PLUS Emulator for the FX-115ES PLUS. 0 Comments System Requirements Operating Systems. Casio Fx 991 Es Plus Emulator Free Download. CASIO fx-991ES PLUS Emulator, Free Download by CASIO COMPUTER CO., LTD. Choose the most popular programs from Audio & Video software Download Review Comments Questions & Answers Proceed to the website of CASIO COMPUTER CO., LTD. Casio fx es plus emulator.rar Full version CASIO fx-991ES PLUS Emulator download. Easy to change the size of the emulator image. The emulator makes it possible to mimic fx-ES PLUS calculator operation using your computer’s mouse and keyboard. Mail us and rate this app positively! If there is enough demand, we will develop it. If you want to have this calculator as an app, please let us know. This calculator application is meant to be a 1:1 clone of the CASIO FX-991 EX/DEX, the most intuitive and at the same time most powerful calculator on the market.