New-BulkItemsFromContextMenu.ps1

#This script will create sitecore items based on given count and template  
$InputCount=10
$InputTemplate = Get-Item "master:\templates\Sample\Sample Item"
$result = Read-Variable `
     -Parameters @{Name="InputCount"; Title="How many items do you want to create?"},
                 @{Name="InputTemplate"; Title="Using which template you want to create item?"; root="/sitecore/templates/"} `
     -Title "Bulk item create tool" `
     -Description "Please provide the number of items and the template that you want to be used"

if($result -eq "ok"){
  $getCurrentItem = Get-Item .  
  $NewItemPath = $getCurrentItem.FullPath  
  $CurrentChildCount = $getCurrentItem.Children.Count+1  
  for ($index = $CurrentChildCount; $index -lt $CurrentChildCount+$InputCount; $index++)
  {  
     new-item -Path $NewItemPath -Name $index -type $InputTemplate.Paths.Path
  }
}