Software FX
Software FX, Inc. was founded in September of 1993 as a component vendor for the emerging visual development community, which capitalized on the increasing demand for reusable objects. At Software FX, quality customer service and highly useful products are their main goals.
Xtremesoft
Xtremesoft maximizes the availability of your custom built Microsoft applications built on, COM+, and .NET Enterprise Services. The focus is on monitoring, alerting and managing business transactions. This includes metrics on packages, applications, components, and their methods.
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.