KeepTool
KeepTool's only business, since founding in 1997, has been the development and marketing of productivity tools for Oracle developers, database administrators and end users. As the Oracle database evolves and advances, they incorporate the latest capabilities into their products, while maintaining the core interface structure that their customers have come to rely on.
Visible Systems
Visible Systems is an IT company specializing in framework-based software engineering throughout the enterprise. Visible Systems history predates that of the PC, Windows and even DOS. Visible Systems was the first in the modern software engineering world to recognize the need for a software documentation system that would allow its clients to document their information systems electronically.
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.