10 GHz Log is an Excel spreadsheet to assist in generating logs for the ARRL 10 GHz and Up Contest written by KK6MK. After entering data for the QSO's the spreadsheet calculates distances between grid squares and calculates the scores. It can generate a text log file that can be submitted to ARRL.
It was done with Microsoft Excel 97, but as far as I know, it works with newer versions.
The spreadsheet is freeware and may be shared in its zipfile form.
Read the text files included in the zip for guides to using the spreadsheet.