ASL 2.0 and (CC-BY and CC-BY-SA and W3C) and GPLv3 (5)
Apache License, Version 2.0
A Java library for Microsoft Documents
Apache POI - the Java API for Microsoft Documents
Java API To Access Microsoft Format Files
Java library for reading and writing Microsoft Office file formats, such as Excel, PowerPoint, Word, Visio, Publisher and Outlook. It supports both the older (OLE2) and new (OOXML - Office Open XML) formats.