Is there a Terminal-like app for iOS? I am looking for an app that has some of the same functionality (ssh specifically) as the Terminal application on the desktop. What different apps exist for iOS that have this functionality?
Prompt for iOS

Prompt allows you to remotely SSH into another machine. Without jailbreaking, there is no way to use Terminal to access your file system. However, I've found that if you do jailbreak your phone and want to use Prompt as a Terminal, you can set it to SSH to server 127.0.0.1 and authenticate with the standard iPhone root credentials. 

Remoter: Remote Desktop (VNC) for iOS

This app does basically the same thing just a little differently. By default it allows a VNC connection for screen sharing, but it has different add ons that you can purchase that allow SSH, Telnet, and RDP.