...You can transfer files in the semi-standard xpf format, supported by some other crossword-editing software.
There's also a completely portable random crossword generator. It's an independent program, but shares a lot of code with Crossword Designer.
The Geek CodeGenerator will generate a geek code block for you by asking you a series of questions about yourself. The generated code can be pasted into your .sig or anywhere else you would like to display your geekiness.