The AWS Cost Explorer is a free tool that allows you to view charts of your costs. You can
view cost data for the past 13 months and forecast how much you are likely to spend over the
next three months. Cost Explorer can be used to discover patterns in how much you spend on
AWS resources over time and to identify cost problem area
The TCO calculator is a free tool provided by AWS that allows you to estimate the cost
savings of using the AWS Cloud vs. using an on-premised data center
The AWS Simple Monthly Calculator helps customers and prospects estimate their monthly AWS
bill more efficiently
AWS Budgets gives you the ability to set custom budgets that alert you when your costs or
usage exceed (or are forecasted to exceed) your budgeted amount