Source code: https://github.com/zerothi/sisl

Short description: sisl is an open-source easy-to-use density functional theory APIframework to post-analyse density functional theory codes output as wellas providing tight-binding calculation capabilities. It couples to a widerange of density functional theory codes and has a high connection withLCAO codes such as Siesta. The tight-binding matrices can be used innon-equilibrium Green function calculations with TBtrans as a backend.