Our website provides a free download of Postage 3.1.3 for Mac. Postage for Mac relates to Developer Tools. This free software for Mac OS X is an intellectual property of Workflow Products, L.L.C.
From the developer:
Postage is a free PostgreSQL administration tool and a rich alternative to PGAdmin and PSQL.
You may want to check out more software for Mac, such as Postage Calculator for Royal Mail, PictureItPostage or Sports On Stamps, which might be similar to Postage.