Back up EC2 instances by Snapshot/AMI. Capable of managing backup retention period.

You can get AWS Account Number by AWS API

Collect AWS Support cases

cecha (Check ELB Certificate's Hash Algorithm)

Sweep expired and not assigned server certificate on AWS

Amazon RDS create a snapshot automatically. Snapshot that is created automatically, will be lost when the instance is terminated. This script preserve db snapshots by copy snapshots.

Calculate bucket/region/account total size usage of Amazon S3.

Sgupdater is a tool to update the permissions CIDR of AWS security group.