WPCubed
WPCubed GmbH is a privately owned company based in Munich, Germany. WPCubed have been providing development tools since 1996. Their flagship product is WPTools, a well known and successful word-processing component suite. Their PDF products, which have been available since 2000, are also used by thousands of developers worldwide. Although mainly supporting Delphi and C++Builder, WPCubed are expanding to other platforms to give more developers access to their powerful tools. The recently introduced PDFControl and RTF2PDF DLL's, allow access to PDF technology for almost any developer.
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.