Excel to LaTeX
This add-in for Excel enables you to quickly create tables in Excel and convert them to the LaTeX tabular format.
To install, just unzip the file and drop the Excel2LaTeX.xla file in your add ins folder (under Program Files or Applications, depending on your OS). Then from within Excel, select Tools > Add-Ins and check the Excel2LaTeX box.
To use, select the range of cells that you want to convert to a LaTeX table and either select Format > Convert Table to LaTeX or click the icon on the Xcel2LaTeX toolbar that is created upon installation. Copy the text to the clipboard and paste it into your LaTeX frontend.
Note: For whatever reason, when using Excel on Mac OS X, the end line “\end{tabular}” contains characters that confuse LaTeX. The best solution to this problem is to delete that line and re-type it manually.
Update [15 Mar 08]: This macro is no longer available from the author’s website, but it can still be downloaded from Softpedia. I have updated the link.