This document discusses various low-cost technologies for measuring physiological signals and tracking human behavior, including EEG headsets, sensors for recording signals like ECG, EDA and muscle activity, eye tracking systems, wearable devices, and software for data collection and analysis. These tools offer affordable options for neuroscience and psychological research limited by budget. While low-cost, their limitations must be acknowledged. Overall, the document presents inexpensive hardware and software that can enable researchers to continue their work despite economic constraints.