Answer by Winston Ewert for Alternatives to the singleton pattern

There are a few alternatives:

Dependency Injection

Every object has its dependencies passed to it when it was created. Typically either a framework or a small number of factory classes are responsible for creating and wiring the objects

Service Registry

Every object is passed a service registry object. It provides methods to request various different objects which provide different services. The Android framework uses this pattern

Root Manager

There is a single object which is the root of the object graph. By following the links from this object any other object can be eventually found. Code tends to look like:

GetSomeManager()->GetRootManager()->GetAnotherManager()->DoActualThingICareAbout()