Version 9 is now available! Please see below for more details on new features you can find in V9:

SpreadsheetGear for .NET Standard has been renamed SpreadsheetGear Engine for .NET, which will target both .NET Standard 2.0 and .NET 6.
A new SpreadsheetGear for Windows product that targets .NET 6 and provide UI capabilities for WinForms and WPF running on that platform. More details available on the SpreadsheetGear.Windows NuGet package page.

Support for reading and writing Cell Comments / Form Controls in Open XML file formats (*.xlsx and *.xlsm), which stems from a longstanding limitation discussed in our documentation’s Limitations Page.
Support for embedded pictures in print headers / footers, which also relates to the above VML limitation.
SpreadsheetGear Engine for .NET (formerly "SpreadsheetGear for .NET Standard") now includes DataTable- and DataSet-related APIs, such as:
Document Properties and Custom Properties.
Shape enhancements / better compatibility with Excel, including:
Support for embedding shapes within charts.
Support for picture cropping including support for negative picture crop values.
Better support for Radio button form controls.
Grouping / ungrouping shapes.
"Fine-grained” worksheet protection options (i.e., the checkbox options in Excel's "Protect Sheet…" dialog).
DPI property for SpreadsheetGear.Drawing.Image class.
Create chart sheets
Updated new workbook theme to more closely match recent versions of Excel.
Added support for Alt+Down key combination to display the data validation dropdown list control.
The SpreadsheetGear family of products is made up of powerful and flexible Microsoft Excel-compatible spreadsheet components that run on any .NET platform and have no dependencies on Microsoft Excel.

A broad cross-platform library that provides a programmatic, in-code spreadsheet feature set similar to that offered by SpreadsheetGear for .NET Framework.
SpreadsheetGear for Windows
Builds on top of the SpreadsheetGear Engine for .NET product to provide various Windows-based UI capabilities.
SpreadsheetGear for .NET Framework
Trusted by thousands of companies for over 17 years and 9 major version releases, SpreadsheetGear for .NET Framework is the ultimate solution for all things spreadsheets on .NET Framework.