Singleton – duh. But there is more.

Object pooling
https://youtu.be/9-zDOJllPZ8

Service Locator
https://msdn.microsoft.com/en-us/library/ff648968.aspx

Publish–subscribe pattern
https://www.romanluks.eu/nezarazene/great-explanation-of-events-and-delegates-in-c/

more patterns here
http://gameprogrammingpatterns.com/

Do you have favorite patterns? Let me know in the comments 🙂