CSV Creator allows you to easily create CSV file.
You can either :
In this last case (writing to an existing file), the app will even add your value to the good column (selected by it's name), no need to keep track of the column order!
New column not in the already existing file? The new one will be added at the end.
These are some of the use cases we've created this app for:
Keeping track of click number and color mode for numeric press;
Creating import CSV file for a third-party application (variable data, imposition, ganging...);