FreeSort - simple tool for sorting data from any table on any fields in the key.
Any NAV version with normal support recordref and fieldref types (I think with 3.7 and up). On form (sorry for style) you can be find function which can sorting any data on any fields. But in this solution for demonstration purposes fields may selected only in one order.
Sounds interesting. A bit more details would be nice! :) What versions does it support?