Outputs

• Showing the information about any created Resource

ChangeSet

• History of the changes that are done on the stack will be recorded in AWS using Changeset.

StackSet

• Deploying a template to multiple regions

Calling one template from another

• Nested Cloud formation Stack is the preferred way of creating/using one stack resources in another
• Import Value Function can also help in reusing but you need stacks name and output values

Calling Stacking from AWS CLI

• Create Stack
• Refer Here for all the possible AWS Cf CLI Commands

Cloudformer

• Way of creating a CF Template from existing resources.