When designing request handlers for a GUI, the chain-of-responsibility pattern lets a command be passed along a series of processors until one of them handles it.

In Java, the marker interface pattern is often used to indicate that objects can be safely serialized without adding methods.

The architect recommended the visitor design pattern to handle operations on heterogeneous collections without changing their classes.

The curiously recurring template pattern helps implement static polymorphism by having a class inherit from a template instantiation of itself.

When designing a framework, I often apply the non-virtual interface pattern to ensure derived classes can customize behavior only through specific protected hooks.