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.
Edraw
Edraw (Edrawsoft) is a trusted service provider of graphic diagramming software and office component solutions for some of the world's most recognizable brands. Their vision is to focus on providing drawing solutions that enable customers to do their jobs with maximized productivity, little effort, minimal time and at affordable costs.
Resco
Resco has extensive experience with development of mobile applications ranging from system utilities through multimedia applications, and games to comprehensive enterprise solutions. Resco .NET controls’ design is based on this experience allowing you to easily create solutions that mobile users need.