Rebex
The Rebex mission is to provide top quality components for .NET developers (https://www.rebex.net) and a Lightweight SFTP / SCP / SSH Server for Windows (https://www.rebex.net/buru-sftp-server/). Rebex has been creating and selling .NET components worldwide since 2002. They have been developing software for .NET platform since the first public beta version of .NET. Rebex is located in Prague, Czech Republic. Their company also provides software development and outsourcing services for system integrators in the Czech Republic.
Add-in Express
Add-in Express Ltd. has a history of leadership in the Microsoft Office integration industry being the pioneer of tools and solutions based on Microsoft Office. It has been working on the development tools and components market since 1998. Its components and tools are distributed and used worldwide by tens of thousands of developers including the most Fortune 500 companies who integrate and embed their applied code into all applications from the Microsoft Office Suite. It works on three platforms (Microsoft .NET, Microsoft VSTO 2005, and Borland VCL) supports all available MS Office applications, versions and suites, and targets its products to help developers save time and money with elegant commercial class solutions.
Planatech Solutions
Founded in 1996, Planatech Solutions is a privately owned company, specializing in cross-language & cross-platform interfaces. Based on nearly 20 years experience in the Financial Markets, Planatech has produced both commercial and bespoke software. The company's most successful commercial product, XLL Plus, first went to market in 1998, and simplifies the process of converting complex mathematical models written in C/C++ to instantly usable add-in functions in Excel. Clients include investment banks, hedge funds, energy industries, universities.