Cloudability - Cloudability lets you monitor, manage and communicate your cloud costs with one easy tool.
FrugalBot - FrugalBot delivers straightforward metrics for customers to measure the effectiveness of AWS Cloud...
Amazon CloudWatch - Amazon CloudWatch is a monitoring service for AWS cloud resources and the applications you run on AWS.
Promo.com - Every promotion starts with Promo.com.
CloudCheckr - CloudCheckr provides security, cost and usage reporting and analytics to help users manage their AWS deployment.
AWS Cost Explorer - Cloud Cost Management