Two TCL packages - Datamatrix and QR Code - to generate respective 2D codes.
Copy datamatrix and/or qrcode directories into TCL lib location. Consult info lib if in doubt where that is.
display_datamatrix.tcl and display_qrcode.tcl scripts could be used to display provided text as a Datamatrix or a QR Code respectively. Their main purpose however is to provide a demo of calling the matrix generation API.
wish display_datamatrix.tcl "Hello, World!" -window .
wish display_qrcode.tcl "Hello, World!" -window . -ppm 4