This is the one that inspired the blog. Ichillapp.com could be so easy to overlook. It looks like the 1990s. It's just a few pages of white text on a black background, organized behind big green buttons. However, the content is great. It's developed by the Trauma Research Institute, and offers core concepts for getting in touch with your own natural rhythms and staying resilient in the face of the ups and downs of life. It's written in plain English and is easy to use.
There's an app and a web version, virtually identical although the app has optional audio so you don't have to read it yourself. A simple yet helpful feature for people really trying to work on these skills at home. Make sure all other audio apps are completely closed for the audio to play. The app version also has a simple mood/anxiety assessment tool that's not on the web, but is easy to recreate with pen and paper.
To reach more people, I copied the text off the web into a word document that I could hand it out to clients. I also helped a client download the app during session to use at home. We're using it as a way to structure our work for a few weeks, going through one section at a time. I really love how simple it is, and even find it's clunkiness a bit charming. It's free and easy, bite-sized education.