List of Spreadsheet Software

Conversion & Manipulation

List of libraries and packages that can be used to convert and manipulate spreadsheet files programmatically.

C#

Free

• Closed XML
• Excel Interop
• NPOI
• Open XML SDK

Paid

• Aspose Cells
• EPPLUS
• GemBox
• Spire.XLS
• Syncfusion

Java

Free

• Apache POI
• docx4j

Paid

• Aspose Cells

Comparison

List of software, that can be used to compare the contents of two different spreadsheets.

Paid

• Microsoft Spreadsheet Compare
• Beyond Compare 4
• Diffchecker

Free

• XL Comparator, online only

Readers

List of spreadsheet readers.

Paid

• Microsoft Excel, write and read

Free

• LibreOfffice Calc, write and read
• Apache OpenOffice Calc, write and read
• ONLYOFFICE Spreadsheet Editor, write and read
• WPS Office Spreadsheet, write and read
• Google Sheets, write and read
• Apple Numbers, write and read
• Calligra Sheets, write and read
• Gnumeric, write and read
• Aspose Excel Viewer, read only, online only

Validators

List of spreadsheet validators.

Java

Free

• KEEPS Validator ODF, validate OpenDocument
• ODF Validator, validate OpenDocument
• ODF Validator online, validate OpenDocument online

C#

Free

• OOXML Validator CLI, validate Office Open XML
• OOXML Validator VS Code extension, validate Office Open XML
• Open XML SDK, validate Office Open XML