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.
AutoDWG
Founded in 2002, AutoDWG is an innovative software company providing high-efficient and user-friendly CAD software around the world. They use innovative technologies to improve their software, helping you to read, write, encrypt, share and convert between files of PDF, DWG, DXF, DWF, SWF and GIF formats.