Online Command Line Interface is a project intended to bring feel of the classic command lines exhibited by GNU&Linux operating systems. It is written entirely in Javascript, and works on all major browsers.
WidgetTerm is a terminal Dashboard Widget for Mac OS X 10.4 or above. This widget implements the terminal function through the Web Kit Plug-in in Objective-C powered by iTerm's open source terminal implementation.
ajaxWM is a themable ajax-and-python-based window manager, which provides multiple flexible terminals in a web-browser for comfortable remote-controlling of a computer via a network without having to install any software on the client-side.