Is there an alternative to PDF Creator in ubuntu?

The answer is yes.
Just install the package cups-pdf and configure the new virtual printer.

sudo aptitude install cups-pdf

Go to System Menu > Printers

1. Choose New Printer;
2. In the dialog box will appear virtual Generic CUPS-PDF Printer, select it;
3. Continue forward and give a name to the the new printer  (Print-PDF will be fine);
4. Print test page .

All the printed pdf will be saved in the folder named PDF in your home folder.

Rinaldo