Wapp is a new framework for writing web applications in TCL, with the following advantages:

Very small API → easy to learn and use
A complete application is contained in a single file
Resistant to attacks and exploits
Cross-platform → CGI, SCGI, or a built-in web server
The MVC design pattern is supported but not required
The Wapp framework itself is a single-file TCL script that is "source"-ed, "package require"-ed, or even copy/pasted into the application TCL script
2-clause BSD license