For Excel (versions 7 and later) and Google Sheets.
This is a set of datasheets that automatically calculates and displays a student’s Mean Length of Utterance (MLU) for up to 6 language samples. It generates attractive printouts that show a student’s progress over time in chart and table form. All you do is enter your sample, put an apostrophe before morphemes you want marked and brackets around text you don't want counted, and that's it! Directions and examples included.
You can try it out by downloading the Preview (Demo Version - functionality is limited).