You can find here some notes, freebies and useful links to external resources.
The notes are personal summaries that I make available, but they are not a substitute for the articles they summarize. To learn more about a subject, consult the sources! :)
Atomic Design Memo - Molecular Design System by Brad Frost
Getting Real Memo - Creation of a successful web application by Basecamp
tool Colorable - Contrast checker for web interfaces
article Kill your Personas - How persona spectrums champion real user needs by Margaret Price