iBiology: A collection of high-quality, free online videos of scientists talking about their research, career paths, and related topics. Several complete courses are also available in areas including experimental design, microscopy, and image analysis. iBiology also has resources for flipped-classroom teaching.
National Research Mentoring Network: A free, web-based platform designed to help undergraduates, graduate students, and postdocs connect professionally through online mentoring and networking activities.