There's one built in: InkWriter.
(Look under Start -> Programs -> Applications.
)
There are also third-party applets out there. Micro Cheng's MyTools has such an applet:
http://www.micro-cheng.com/products/mytools.html
You can use the CE 2.1x ARM version on the 720.
I'm sure other members here will have others to suggest as well.