.XLL

.XLL file extension

This is the list of programs to work with .XLL extension

Microsoft Office 2003 Web Services Toolkit

Microsoft Office 2003 Web Services Toolkit Microsoft Office Excel XLL Add-In

Microsoft Excel 2003

Microsoft Excel 2003 Microsoft Office Excel XLL Add-In

Microsoft .NET Framework Hotfix (KB928367)

Microsoft .NET Framework Hotfix (KB928367) Microsoft Excel XLL Add-In

Microsoft Office 97, Developer Edition Tools

Microsoft Office 97, Developer Edition Tools Microsoft Office Excel XLL Add-In

Microsoft Office Visio

Microsoft Office Visio Microsoft Office Excel XLL Add-In

It allows you to create professional diagrams to simplify complex information.
Security Update for Microsoft Office Word 2007 (KB950113)

Security Update for Microsoft Office Word 2007 (KB950113) Microsoft Office Excel XLL Add-In

This update is to prevent other to run and modified in a malicious way a file.
Microsoft Text-to-Speech Engine (English)

Microsoft Text-to-Speech Engine (English) Microsoft Excel XLL Add-In

Microsoft Global IME for Office XP (Japanese)

Microsoft Global IME for Office XP (Japanese) Microsoft Office Excel XLL Add-In

DjVu ActiveX Control for Microsoft Office

DjVu ActiveX Control for Microsoft Office Microsoft Excel XLL Add-In

You will have a better user experience by using this plugin.