Nokia Smart Installer for Symbian v1.0
Nokia Smart Installer for Symbian is a deployment solution designed to ensure that although packaged in a small installer kit (*.sis file) an application can be deployed on a supported Symbian device which doesn’t yet have the required add-on libraries.
These libraries will be download and installed only when the installer detects that they are needed or that they should be upgraded.
In particular this solution provides support for distributing Qt applications without embedding the large Qt libraries in the distribution package.
For download and more details head over HERE.