Wetty - Terminal over HTTP and HTTPS.
Shell In A Box - Shell In A Box is a web based AJAX terminal emulator that can export arbitrary command line tools...
Bastillion - Bastillion is an open-source web-based SSH console that centrally manages administrative access to systems.
SSHy - SSHy is a HTML5 SSHv2 web client implementing E2E encryption that runs well on modern web browsers.
TinyShell - TinyShell is an open source UNIX backdoor.
SerialTerminal.com - A Python Serial interface terminal.