RealMint is an ANSI terminal emulator and telnet client written completely in JavaScript. When installed, RealMint lets you login to your server from a web browser using telnet and an encrypted HTTPS tunnel.
Wetnet - Web and Wireless Telnet
Wetnet alows people to access telnet services over the web and via wap browsers, giving you full access to the internet over any web-enabled device such as public web access terminals and wap enabled phones.