NZFF

This free educational app is available in the Windows Store at the moment. It has a 3D map of the landscape on April 25th, 1915, and includes some audio of actual ANZAC war diaries, along with some kinda weird computer video re-enactments.
This is based on an earlier documentary produced by Australian Broadcasting Corporation.

This is one area I love following, really the thing, the entire campaign and the others, Gallipoli , ANZACS