PsychoPy is an open-source software application designed for creating experiments in behavioral science, offering precise control over stimulus presentation and timing. Over the past decade, PsychoPy has evolved significantly, introducing a graphical interface called Builder, which allows users to create experiments without programming knowledge. This article highlights the key features added to PsychoPy, including the Builder interface, enhanced stimulus options, asynchronous hardware polling, and improved support for open science and reproducibility. The software now supports Python 2 and 3, and includes features like rating scales, movie stimuli, and element arrays. PsychoPy also offers a robust development and testing workflow, with a growing community of contributors and users. The article discusses the current state of the project and future plans, emphasizing its role in advancing open science and facilitating high-quality, precise experiments.PsychoPy is an open-source software application designed for creating experiments in behavioral science, offering precise control over stimulus presentation and timing. Over the past decade, PsychoPy has evolved significantly, introducing a graphical interface called Builder, which allows users to create experiments without programming knowledge. This article highlights the key features added to PsychoPy, including the Builder interface, enhanced stimulus options, asynchronous hardware polling, and improved support for open science and reproducibility. The software now supports Python 2 and 3, and includes features like rating scales, movie stimuli, and element arrays. PsychoPy also offers a robust development and testing workflow, with a growing community of contributors and users. The article discusses the current state of the project and future plans, emphasizing its role in advancing open science and facilitating high-quality, precise experiments.