Excel 95 and later file converter
xlHtml is an Excel 95 and later file converter. Its html output can be
used as a Netscape Plug-in to let you view xls e-mail attachments. It
can also extract regions of a spreadsheet and convert the spreadsheet
to pure text rather than html.
The pptHtml program converts PowerPoint files to HTML.
There is no official package available for openSUSE Leap 15.5