FriCAS is a general purpose computer algebra system with a strong focus on mathematical research and development of new algorithms. It comprises an interpreter, a compiler and a still-growing libraryof more than 1,000 domains and categories. FriCAS is comprehensively documented and available as source code and as a binary distribution for the most commonplatforms. Compiling the sources requires besides other prerequisites a Common Lisp environment (wherebymany of the major implementations are supported and freely available as open source).