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.
Jugaad
RadaeePDF SDK is a great PDF rendering and manipulation tool for developers. If you develop mobile or desktop applications the RadaeePDF SDK framework is the "Swiss Army knife" to handle PDF files. More than 6,000 applications are running the SDK on Android, iOS and Microsoft Windows UWP.
AlterNET Software
AlterNET Software provides best-in-class .NET UI controls and frameworks for code editing, scripting, UI designing, and developing cross-platform UI applications. They focus on delivering leading-edge software development products, expert level technical support, and custom development/integration services.
AlterNET Software was founded in 2016 in Sydney, Australia. Over several years they have been developing products and solutions for extending .NET applications with code editing, scripting, user interface designing capabilities and cross-platform user interfaces.