Formica makes it easy to create and deploy CloudFormation stacks. It uses CloudFormation syntax with yaml and json support to define your templates. Any existing stack can be used directly, but formica also has built-in modularity so you can reuse and share CloudFormation stack components easily. This allows you to start from an existing stack but split it up into separate files easily.
For dynamic elements in your templates Formica supports jinja2 as a templating engine. Jinja2 is widely used, for example in ansible configuration files.
Formica can be installed through pip:
pip install formica-cli
Alternatively you can clone this repository and run
python setup.py install
Check out the full Documentation and Quickstart on TheServerlessWay.com