I wanted to share this open source project that I recently contributed to github called automated-cloud-advisor.

Automated Cloud Advisor is an extensible tool that aims at facilitating cost optimization in AWS, by collecting data for resources that are under utilized. In addition, this is a great learning tool for new DevOps/Cloud engineers that want to start automating things in AWS.
The tool is deployed as a set of cloudformation stacks that comprise the data collection and the data can be displayed in a Kibana dashboard.

You can also checkout the installation documentation at disneystreaming.github.io.