OpenOfficeSuite is compatible with:
Microsoft Word (*.doc *.dot)
Microsoft Excel (*.xls *.xlw *.xlt)
Microsoft PowerPoint (*.ppt *.pps *.pot)
Open Office (*.sxw *.stw *.sxc *.stc)
OpenOffice Drawing (*.sxd)
OpenOffice Presentation (*.sxi *.st)
StarWriter (*.sdw *.vor)
Adobe Photoshop (*.psd)
WordPerfect (*.wp *wpd)
Rich Text Format (*.rtf)
Text Spreadsheets (*.csv *.txt)
Windows Bitmap (*.bmp)
Graphics Interchange Format (*.gif)
And Many More..