Looking for a freeware QR code generator

[Howard_Casto]

So something I've been meaning to do for a while is integrate QR codes into a frontend so manuals, ect can be read from your phone, similar to what Nintendo did with the NES Classic.  I seem to have trouble finding a program or source code that will let you make them for free. 

Any suggestions?

[whammoed]

This works for me when I tested:
http://www.qr-code-generator.com
It was the first thing I came to.  Maybe you are needing something else?

Edit:  just reread your post.  Do you need more of an API of sorts that you can build into your program?
If so what language is the front end?
This may be good for .NET:
http://qrcodenet.codeplex.com/

[Howard_Casto]

I'll look into that, thanks.