Aspose.Words is a word processing component that enables .NET applications to read, write and modify Word documents without using Microsoft Word. Other useful features include document creation, content and formatting manipulation, mail merge abilities, reporting features and support of DOCX, DOC, WordprocessingML, HTML, XHTML, TXT and PDF formats (requires Aspose.Pdf). It supports both 32-bit and 64-bit operating systems. You can even use Aspose.Words for .NET to build applications with Mono.