Davisor Offisor
A XML/SAX -compliant 100% pure Java Microsoft Word document content parser, with easy DOM/XSLT integration. Exposes also document structure, style information, and even graphics. [Commercial, demos]
url: www.davisor.com/offisor/index.html
ExcelAccessor Bean Suite
JavaBeans for working with Excel spreadsheets using COM. Requires Microsoft Excel. [Open Source, IBM Public License]
url: www.alphaworks.ibm.com/ab.nsf/bean/ExcelAccessor
ExtenXLS Java/Excel Toolkit
Dynamic Excel reporting in their Java web applications. [Commercial]
url: www.extentech.com/estore/product_detail.jsp?produc...
Java Excel API
Class library for read/write and modify Excel 95, 97, 2000 spreadsheets. [Open Source, LGPL]
url: www.andykhan.com/jexcelapi/
Outlook PST to Unix mail box converter
Converts .pst mail files to unix mbox files. [GPL]
url: sourceforge.net/projects/ol2mbox
POI
APIs for manipulating various file formats based upon Microsoft's OLE 2 Compound Document format using pure Java. Most MS Office files use OLE2CDF. [Open Source, BSD-like]
url: jakarta.apache.org/poi/index.html
Tonic Systems' Java Powerpoint Library
A pure Java class library for manipulating PowerPoint documents. The library provides a reasonably complete API for working with text, graphics and images within PowerPoint documents. [Commercial]
url: tonicsystems.com/technology/products/ppt