The 2.5 version of GridImp is provided as a free download on our website. GridImp belongs to Office Tools. The actual developer of the program is Winwaed Software Technology LLC.
From the developer:
Imports gridded data into Microsoft MapPoint, to produce attractive data maps that resemble contour maps.
Input data consists of a value that is defined for various (gridded) geographic coordinates. Common text output formats such as CSV are supported.
Can handle imperfect data, holes, re-gridding, etc. Can be used to import such attributes as pollution data, seismic hazard, geological information, customer/population distribution, etc.
You may want to check out more software, such as SpinnerDemo3, Timer 2007 or XLplus Add-On: Basic II Ver., which might be related to GridImp.