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.
PEERNET
PEERNET products create solutions that range from simple display, printing, and conversion tools, to powerful high-end server-based products that leverage the web to streamline enterprise workflow. Its products allow you to convert any document from any application into a variety of graphic file formats such as Adobe PDF, and high quality digital image files like JPEG, TIFF, GIF and many others.