Can I Email is a handy reference tool that shows the support of different HMTL and CSS across email clients on different platforms, similar to Can I Use for browser compatability.
Smashing Magazine has a handy tutorial on how front-end developers can start learning machine learning. The post describes how to use a pre-trained model, transfer learning and a custom model using Tensorflow.js.
The New York Times have made public the data training material they provide to their journalists. Their three week internal course starts ar data handling from surveys and works up to creating data stories combining multiple data sources.
Tim Nolet of Checkly published a helpful case study on how he captures feedback from his constumers on the SaaS product Checkly. The post describes their eperiences at using Hotjar to capture bugs from users, Drift chat to communicate with users, deploying a survey and a public roadmap of features.