The WPS file format is very similar to the DOC format, it too is a text document but it is created with Microsoft Works Word Processor; and does not include advanced formatting options and macros that a Word document may contain. Most versions of Microsoft Word can open a WPS file, as well as Microsoft Publisher. However this format has been discontinued since 2006 and replaced with the standard MS Word DOC format.
The file format WPS is used by Microsoft Works Word Processor files. These files contain word processing documents created by the Microsoft Works software suite. WPS files contain richly formatted text as well as images, clipart and tables. A C++ library exists, called libwps which allows reading and writing of WPS documents, this library allows applications such as OxygenOffice and NeoOffice to open and edit WPS files.
Microsoft Word Microsoft Works Word Processor NeoOffice OxygenOffice Works Converter
Open Office of which ODT is part of was developed by Sun Microsystems around twenty years ago. The software is open source and is seen as a viable free alternative to Microsoft's Office suite of products. Open Office opens most Microsoft document formats and is is provided as a free download, without restrictions on license. The writer application which produces ODT files is the word processing element of Open Office.
The Open Document Format is an open standard developed by Sun Microsystems under the guidance of OASIS (The Organization for the Advancement of Structured Information Standards). Originally the OpenDocument format was XML based and had at it's root, it now takes the form of a zip file much like Microsoft's DOCX format and takes advantage of the ZIP's compression technology to reduce the overall file size. Writer documents take the form of .odt and .fodt.
Microsoft Office 2007 Microsoft Office 2010 OpenOffice Writer