During my stumblings into Mathematics I was extremely excited to find FREE Mathematics software that is comparable to programs like Mathematica and Maple. This has a text command line driven interface which is a bit confusing and awkward to navigate at first. but, there is a large support community and a lot of tutorials to help figure things out. I’ll be using this quite a bit in the future in my own research and explorations. There is both a cloud based server or a downloadable version of the software. I am currently using this as I do some refresher work with Complex Numbers. Hopefully, I’ll be publishing my first notes here soon.
The link to the site is http://www.sagemath.org