Toolbar Controls .NET for Microsoft Office is Commercial
program for Windows developed by Add-in Express Ltd.
It allows developers to embed any .NET controls into MS Office toolbars at design-time. You can originate feature-rich toolbars of Outlook, Excel, Word, PowerPoint. Supports VB.NET, C#, C++ .NET, J# in Visual Studio 2003 and Visual Studio 2005.
Add-in Express Toys for VSTO and Excel is Freeware
program for Windows developed by Add-in Express Ltd.
This is a free sample add-in (ready to instate and utilize) that adds some useful features to Microsoft Excel. It contains a replete source pandect in VB and C# and supports Excel 2003 and 2007. The add-in workshop in VSTO 2005 SE and VSTO 2008 (VB.NET, C#).