I always find the same problem with all Mathematica clones (Mathics, Sage, wxMaxima). Do they offer a .exe that I can install, then click on a button and start

I always find the same problem with all Mathematica clones (Mathics, Sage, wxMaxima). Do they offer a .exe that I can install, then click on a button and start a program without any tinkering. Mathics and Sage no. wxMaxima yes. Although I always had the feeling that wxMaxima is more an alternative to Derive than Mathematica at this point. Mathematica works because it is easy to deal with, no installing packages, libraries, libraries incompatible with others. You have Mathematica 9, you got all that Mathematica 9 supports. You send a notebook to someone else, they can execute the notebook if their mathematica version is equal or larger. It is like saying that Latex is an alternative to word. No, they both make documents, but one is not an alternative to the other one.