DateLine 1.4.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The most popular versions of the software are 1.4, 1.2 and 1.1. This Mac app is a product of MachineCodex Software. DateLine for Mac relates to Productivity Tools.
From the developer:
DateLine is a small, simple app which displays a linear calendar on your desktop in a transparent window. It provides easy access to iCal by double clicking on a day. The background element colour is customisable with support for transparency.
You may want to check out more software for Mac, such as Business-in-a-Box, Pester or AwakenHelper, which might be related to DateLine.