Aspose.Cells is a .NET component for spreadsheet reporting. It supports formula calculation engine, pivot tables, VBA, workbook encryption, spreadsheet formatting, formulae, functions, drawing objects and allows saving Excel file into other formats.
Completely free and without ads, openElement is a community-centered WYSIWYG (IDE) web authoring studio. Choose from many functional, graphical, ready-to-use and adaptable elements. Publish W3C-compliant code that is compatible across all browsers.