Out of curiosity, which programming language/framework do you use for Quickfile?
On the server side we use .NET, some parts are written in VB.NET other more recently built modules are written in C#. We use SQL Server to host our database. We also use JQuery for most of our client side interaction and various other JQuery plugins for the dialogue boxes, auto-complete drop-downs, data grids and other various UI components.
The above is a very brief overview of the key software elements, when I have a bit more time I will post something on our blog that goes into a bit more detail on this subject.
Excellent, very detailed and quick response. Thanks.