You can open and save files in the OpenDocument Spreadsheet (. An ODS file is a spreadsheet created by the Calc program included with the Apache OpenOffice suite. ODS is an OASIS-formatted file, which is expected to become the standard file format for sharing documents. Files with ODS extension stand for OpenDocument Spreadsheet Document format that are editable by user. The ODS file extension is given to files that are created with the calc program - a spreadsheet application which is XML based but contains spreadsheets, charts. ODF files have the following file extensions: *.