A tool to extract WSP solutions from SharePoint to hard disk

http://archive.msdn.microsoft.com/SPSolutionExtractor

http://blogs.technet.com/b/patrick_heyde/archive/2009/08/28/how-to-extract-wsp-files-from-sharepoint.aspx

Resource Page Description
This tool allows to verify all wsp files installed on SharePoint 2007 Farm. And it allows to download the wsp files from SharePoint Database to hard disk.

Usage:

SharePointFarmSolutionExtractor.exe -list
(This command list all WSP-Solution installed on the SharePoint Farm)


SharePointFarmSolutionExtractor.exe -extractAll c:\SharePointSolutions
(This command download all WSP-Solutions installed on the SharePoint Farm to the specified path)


SharePointFarmSolutionExtractor.exe -extractById c:\SharePointSolutions
(This command will download all WSP-Solution with matching the SolutionGUID to the secified path)

SharePointFarmSolutionExtractor.exe -extractByName
c:\SharePointSolutions
(This command will download all WSP-Solution with matching the SolutionName to the secified path)

Requirements:
- .NET 2.0
- Microsoft.SharePoint.dll