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.
DlhSoft
DlhSoft is focused on building high quality and innovative solutions using Microsoft .NET and related technologies for customers worldwide. Thier activity includes designing and developing general purpose software applications, components and tools, and customized software solutions upon request.
JointJS
JointJS are part of client.IO, a company dedicated to developing Low-Code/No-Code tools and empowering innovative thinkers to create amazing products faster.