1. HeartPy – Python Heart Rate Analysis Toolkit for noisy PPG signals: free & open source 2. g.NAUTILUS PRO artifact-free EEG signals: very expensive as for instance used in this paper: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0217288 3. Adinstruments Equivital wireless physiological monitoring system: very expensive https://www.adinstruments.com/partners/equivital