catdoc is a program for viewing MS Word documents. It produces plain
text output and can optionally convert non-standard characters into 
TeX control sequences.

xls2csv is a program which converts an MS Excel spreadsheet into a
comma-separated value file.

catppt is a utility to extract textual information from MS Powerpoint
files.

Flavors:
        tk - a Tcl/Tk GUI frontend to catdoc for viewing MS Word
             documents