Terminal over http. Wetty is an alternative to ajaxterm/anyterm but much better than them because wetty uses ChromeOS' terminal emulator (hterm) which is a full fledged implementation of terminal emulation written entirely in Javascript. Also it uses websockets instead of Ajax and hence better response time.
If you run it as root it will launch /bin/login (where you can specify the username), else it will launch ssh to localhost with the node process' user as the ssh login username.