一、NPOI
简介：
NPOI is the .NET version of POI Java project. With NPOI, you can read/write Office 2003/2007 files very easily.
官网地址：
https://github.com/tonyqus/npoi
http://npoi.codeplex.com/
二、EPPlus
简介：
EPPlus is a .net library that reads and writes Excel 2007/2010 files using the Open Office Xml format (xlsx).
官网地址：
http://epplus.codeplex.com/
三、DocX
简介：
DocX is a .NET library that allows developers to manipulate Word 2007/2010/2013 files, in an easy and intuitive manor. DocX is fast, lightweight and best of all it does not require Microsoft Word or Office to be installed.
官网地址：
http://docx.codeplex.com/
.Net开源Excel、Word操作组件－NPOI、EPPlus、DocX
原文：http://www.cnblogs.com/jacktang/p/4493760.html