Open Document Spreadsheet extension
I discussed with @eveen that some people are apparently incapable of opening CSV files in Excel, and it may be useful for this group of end users to be able to download an Excel file instead. According to https://serverfault.com/q/73987 this is possible by either generating a HTML-like file, or with some external tool on Linux; for Windows there is e.g. https://stackoverflow.com/q/31606394. Perhaps something like this can be added as an iTasks extension next to iTasks.Extensions.CSVFile.