I've been using a Texas TI graphing calculator at school and am wondering if there are programs for the PC that function similarly (with similar features) as those calculators. I don't need an emulator (its illegal to use one without owning the calculator anyways) but want a program that actually looks like one of those machines and functions like one.
The program should be free (preferably open source), and I'm looking for suggestions as to what programs I should download.
Ok, I'm now using Microsoft Mathematics (free program) which has a GUI, natural display and the CAS features I need.
https://en.wikipedia.org/wiki/Microsoft_Mathematics
Download:
https://www.microsoft.com/en-ca/download/details.aspx?id=15702