The Survey Manager tool is very configurable and can be integrated into other systems such as your help desk, CRM or other workflow applications.
It has a Notes Administration Interface and an XPages web interface.
There are three versions of the Survey Manager Application.

Pro Version

Fully Supported
Integrates with other systems such as CRM
Allows surveys to be tracked by person
Supports multi-lingual surveys
Exports to Excel
Automatically generates pivot tables and charts in Excel

Lite Version

Annual support package available

OpenNTF Apache Version

Open Source under an Apache Licence at Open NTF
More information is available on on the Product Page