I am looking for apps that would help me to manage my amazon EC2 servers on an iPad. Are there any apps like that?
I've used Cloud Services Manager to monitor and control my EC2, EBS and S3 instances and storage. Works okay. I wouldn't say it was wonderful, but it'll do in a pinch. If you're used to Elastic Fox you may find it a bit disappointing. Not quite as nice as EF.
More often than not I just use Panic's Prompt ssh client for iOS. It's quite good as ssh clients go and I'll use it to gain access to a known-good instance from which I can then run my own boto-enabled inspection tools or any of the standard EC2 command line utilities.
Between those two I can usually handle most of my EC2 issues from an iOS device.