Actipro Software
Actipro Software, founded in 1999, is a privately-held provider of software components for the Microsoft .NET platform. Based in Cleveland, OH, USA, their focus is on delivering quality user interface software components that customers can trust to add robust functionality to their applications. They have been developing Windows Forms components since .NET was first released, and have become a leading provider of Windows Presentation Foundation (WPF) components.
TRichView
TrichView have been developing rich text editing components for Delphi and C++ Builder since 1999.
Melon Components
Melon Inc. is a software development and new media company providing its clients with world-class software, multimedia and creative services at an outstanding value. Its approach and expertise enables the company to deliver a unique and effective blend of products, creative and technology services customized to fit your company's business goals. Melon Components is the Melon Inc. brand focused on the development of Web components for developers based on the ASP.NET technologies. With a set of professionally written components needed in almost every website, Melon offers the developer its knowledge and experience gathered through many years of building custom projects.
Xamarin
Xamarin was founded in May of 2011 in Boston, Massachusetts. Their mission is to produce the best software development tools in the world, and to make it fast, easy and fun to build great mobile applications. Xamarin is composed of more than 20 members of the team that built Mono, with ten years of experience working together to create a great developer platform.