Old presentations from StarOffice (*.sdd) might be converted to SXI presentations (various versions) in several presentation programs based on OpenDocument architecture. Also some online conversion services supposedly can convert SDD to SXI.
Found 2 different conversion types using the same filename extensions.
Conversion sdd to sxi type 1:
Convert from OpenOffice.org presentation to OpenOffice.org presentation.
Multiplatform software - convert sdd to sxi on any platform
Free presentation program from OpenOffice.org
File type (from-> to)
Convert from sdd file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned sdd to sxi. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Powerful multimedia presentation software tool from LibreOffice suite
Conversion sdd to sxi type 2:
Convert from OpenOffice.org presentation to StarOffice presentation file.
Microsoft Windows software - convert sdd to sxi on Windows
Older multi-platform office productivity suite