High resolution figures from Excel (300 dpi): the XL Toolbox, chart export

Scientific journals have explicit requirements for the submission of figures: Most commonly they require high-resolution TIFF files. Using the XL Toolbox, you can produce graphic files with Excel that meet the requirements of the majority of journals. The Toolbox produces these files directly from Excel; third-party illustrator software or virtual printer drivers are not needed.
You can even produce multipanel graphs by arranging charts and drawings on an Excel worksheet and then export them all together using the XL Toolbox. The layout will be preserved, and spreadsheet gridlines will not appear in your graphic file.


http://xltoolbox.sourceforge.net/scientificpublishing/