Wetty - Terminal over HTTP and HTTPS.
Bastillion - Bastillion is an open-source web-based SSH console that centrally manages administrative access to systems.
Shell In A Box - Shell In A Box is a web based AJAX terminal emulator that can export arbitrary command line tools...
TinyShell - TinyShell is an open source UNIX backdoor.
Gate One - Gate One™ is a web-based Terminal Emulator and SSH client that brings the power of the command line...
Upterm - Secure Terminal Sharing - Upterm is an open-sourced solution for sharing terminal sessions instantly over the public internet via SSH tunnels. It is good for * Remote pair programming * Access remote computers behind NATs and firewalls * Remote debugging