Description: SpreadsheetGear for .NET is a Microsoft Excel-compatible calculation engine compatible with Windows Forms and ASP.NET applications. It supports .NET 1.1 and 2.0 and both C# and Visual Basic, works with Excel 1997 or higher and provides full integration with Visual Studio 2005.
With SpreadsheetGear, end users can view, create, edit and print Excel spreadsheets without using Excel itself. The latest edition, v2.5, adds support for functionality such as cell comments, form controls and TextBoxes.
Company site: http://www.spreadsheetgear.com/
Demo download: https://www.spreadsheetgear.com/downloads/register.aspx