Discussion about which pattern is most important - http://www.adam-bien.com/roller/page/abien?entry=most_important_patterns

Pattern Language Titles - http://c2.com/ppr/titles.html

10 Design Patterns every Software Architect and Software Engineer must know - https://ravindraelicherla.medium.com/10-design-patterns-every-software-architect-must-know-b33237bc01c2

Strategy, Singleton, Observer - https://blog.bitsrc.io/3-design-patterns-every-developer-should-learn-71a51568ac9d