Has anyone had any experience with any linux shipping software?

Looking for a package for doing international USPS package shipping with 
the customs forms.
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Karl Schmidt EMail    Karl@xtronics.com
Transtronics, Inc.    WEB http://xtronics.com
3209 West 9th Street  Ph(785) 841-3089
Lawrence, KS 66049    FAX(785) 841-0434

Half of all people are below average.
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