This simple software takes an exported ZIP file from the Australian NAPLAN website and converts the raw scores into Percentiles (State or National). For most of us, the raw scores are not overly illuminating, but having the student's percentile can tell us some more about his / her ability.
Just Unzip the program file to a suitable directory, select the ZIP file, then choose the test and benchmark (State or National). Finally click, Calculate and Save. A new Spreadsheet file is saved for the chosen test than now includes the percentiles as well as the original data.
The Help button shows the particular information that needs to be exported from the NAPLAN site to allow the percentiles to be calculated.

Version 1.2
+ Added option to convert to Stanines as well as Percentile ranks
Version 1.1
+ Updated for changed filename style in NAPLAN export
+ Allow drag/drop of zip file onto "Source Reporting Test" listbox.