OZtopo 6.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
OZtopo Combined 2-1.exe, OZtopo V3.0 Combined Layer.exe, OZtopo V4.0 Combined Layer.exe and OZtopo V8.0 Combined Layer.exe are the most frequent filenames for this program's installer. This PC program works fine with 32-bit versions of Windows XP/Vista/7/8/10/11.
The most popular versions of the software 6.0, 5.0 and 3.0. We recommend checking the downloaded files with any free antivirus. This software was originally developed by Oztopo. The software lies within System Utilities, more precisely Device Assistants.
From the developer:
OZtopo provides an alternative set of maps, suitable for use on Garmin GPS units. It has been designed as a detailed set of topographical maps suitable for bushwalking, 4WDing and general touring. It is comprised of two mapsets, 10m Contours and Roads and Tracks. Both mapsets can be loaded onto a GPS at the same time. They can also be loaded concurrently with any of Garmin's mapping products, eg City Navigator or BlueChart.
You may want to check out more software, such as EOS Utility, iPHUC for Windows or SoftX Internet Logger, which might be related to OZtopo.