ComPDFKit
ComPDFKit enable developers to integrate PDF Annotations and Format Conversion, Digital Signature, Smart Forms, OCR, Redaction, and more in to their applications on Windows, macOS, iOS, Android, and the web through their PDF SDKs. Their aim is to offer the most comprehensive library to shorten the project development cycle and to continuously improve their SDK products to meet developer's future requirements as they change and projects evolve.
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.
Quiksoft Corporation
Quiksoft Corporation, founded in 1994, is the leading provider of e-mail tools for professional software developers. Quiksoft focuses exclusively on e-mail technologies to provide tools for just about any development environment, which are easy to use, reliable and backed by excellent service. The EasyMail Products are relied upon by over thousands of international corporations, federal, state and local organizations, and individual developers.