This GitHub repository is for source code, documentation, and reporting issues. To download executables, please visit the official website: https://sites.google.com/site/siamquantum
Siam Quantum (SQ) is a compact open-source quantum simulation program, designed for research and education in mind. For research, its speed and accuracy are comparable to the well-established quantum chemistry programs. You could use it to do research and publish your results with confident that your results can be reproduced. For education, it is extensively documented in an easy-to-read math display using Jupyter Notebook which can also be viewed directly on GitHub.
You could download the executables for MacOS, Linux, and Windows from the official website.
LAPACK library is required to build SQ from source code. It should be easy to build LAPACK using a fortran compiler. Optionally, LIBXC library can be called, granting access to other exchange-correlation functionals such as B3LYP, and PBE.