Aqualite

AQUALITE is an annual water-audit model based on the latest IWA best practice. It has been developed through close co-operation of numerous internationally recognised water loss managers from several countries and incorporates a host of features, many of which are not available in other water audit models.

With recent funding from the WRC, AquaLite is in the process of being updated to be better compatible with recent versions of Windows.
See the link below to AquaLite 4.4 Beta version for more information.