Calc2LaTeX is an OpenOffice.org Calc (Spreadsheet) macro for converting tables. It makes making tables on LaTeX very easy.
Worked until LibreOffice version 4.2.1, unfortunately, not working anymore beyond that point.
I wasn't sure if it would work in LibreOffice 3, but everything seems to be functioning correctly. Great stuff.
Worked exactly as advertised, on Open Office 3.0.1!!! Wow that saved me HOURS of work!!! Excellent work! (The install is much easier than the documentation says though - just double-click Calc2Latex.oxt.)