Download Deployed Solutions (WSP) from Central Admin with PowerShell in SharePoint 2013

Using power shell run this below script.
  1. $FolderPath = "c:\Solutions"  
  2. foreach ($solution in Get-SPSolution)  
  3. {  
  4.    $id = $Solution.SolutionID  
  5.    $title = $Solution.Name  
  6.    $filename = $Solution.SolutionFile.Name  
  7.    $solution.SolutionFile.SaveAs("$FolderPath\$filename")  
  8. }  
cmd