Intentional Insights is a nonprofit dedicated to popularizing rationality and effective altruism for a broad audience and thus raising the sanity waterline. It does so by transforming research on rational thinking and cognitive biases into engaging content conveyed in the language of self-improvement, to help people engage most easily with meta-cognitive strategies that help improve thinking, feeling, and behavior patterns. Intentional Insights has talked with the Center for Applied Rationality on collaborative efforts, as CFAR is aiming at the top 5%, and InIn is aiming more at the top 50%-90% of the population.
For some examples of its public outreach work, see its News page
For more on the organization and what it does, see the organization's "About" page
For its effective altruism work, see its EA page
To learn more, get in touch with the Intentional Insights Co-founder and President Gleb Tsipursky, at gleb[at]intentionalinsights.org. He is also the LW user Gleb_Tsipursky, but prefers you to use his email, which he checks more often.