Rebex
The Rebex mission is to provide top quality components for .NET developers (https://www.rebex.net) and a Lightweight SFTP / SCP / SSH Server for Windows (https://www.rebex.net/buru-sftp-server/). Rebex has been creating and selling .NET components worldwide since 2002. They have been developing software for .NET platform since the first public beta version of .NET. Rebex is located in Prague, Czech Republic. Their company also provides software development and outsourcing services for system integrators in the Czech Republic.
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.
PDFlib
PDFlib GmbH is completely focused on PDF technology. Customers worldwide use PDFlib products since 1997. The company closely follows development and market trends, such as ISO standards for PDF. PDFlib GmbH products are distributed in more than 100 countries all over the world with major markets in North America, Europe, and Japan.