Usability evaluation has received considerable attention from both the research and practice communities. While there are many evaluation tools available, the Software Usability Scale (SUS) is the most widely used. In this paper, we introduce and describe the SUS-Lib software package, which aims to compute SUS scores and generate graphical figures based on user input. SUS-Lib responds to the need for user-friendly software that requires only basic knowledge and skills of the Python environment and command line tools. By using open source solutions and low hardware resources, SUS-Lib is a cost-effective solution. In addition, due to its generic nature, SUS-Lib can also be used in different research setups and settings.