GroupDocs
GroupDocs creates easy to use, comprehensive online document management APIs for .NET, Java and Cloud, as well as a range of Cloud apps that improve document collaboration for organizations of any size. GroupDocs saves developers and end users time and money by offering a complete and powerful set of document management APIs allowing users to view, sign, annotate, compare, convert and assemble documents in a wide variety of formats, including Microsoft Word, Excel, PowerPoint and Visio, as well as Adobe Acrobat PDF and many image formats. Flexible workflows and easy-to-use, customizable user interfaces are part of the package.
Add-in Express
Add-in Express Ltd. has a history of leadership in the Microsoft Office integration industry being the pioneer of tools and solutions based on Microsoft Office. It has been working on the development tools and components market since 1998. Its components and tools are distributed and used worldwide by tens of thousands of developers including the most Fortune 500 companies who integrate and embed their applied code into all applications from the Microsoft Office Suite. It works on three platforms (Microsoft .NET, Microsoft VSTO 2005, and Borland VCL) supports all available MS Office applications, versions and suites, and targets its products to help developers save time and money with elegant commercial class solutions.
XFINIUM
XFINIUM is a privately held company founded in 2011. They are an innovative provider of .NET components that enable developers to work with Adobe PDF documents faster and across multiple platforms. They have a strong customer base including large organisations from around the globe.