List-SsisPackages

Param(
    [Parameter(Mandatory=$true)]
    [string]$server,
    [Parameter(Mandatory=$false)]
    [pscredential]$credential
)

[string] $username = $null
[string] $password = $null

if($credential -ne $null) {
    $username = $credential.UserName
    $password = $credential.GetNetworkCredential().Password
}

Add-Type -AssemblyName "Microsoft.SqlServer.ManagedDTS, Version=10.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91"
Import-Module SQLPS –DisableNameChecking -ErrorAction SilentlyContinue
[Reflection.Assembly]::LoadWithPartialName("Microsoft.SQLServer.ManagedDTS")|Out-Null
$SSISServer = New-Object Microsoft.SqlServer.Dts.Runtime.Application

function GetPackageFromFolder($baseFolder)
{
    Write-Host "`tFolder: $baseFolder"
    Write-Host ""

    $elements = [Microsoft.SqlServer.Dts.Runtime.PackageInfos] $SSISServer.GetPackageInfos($baseFolder,$server,$username,$password) 
    if($elements -ne $null) 
    {
        [Microsoft.SqlServer.Dts.Runtime.PackageInfo[]]$packageInfos = $elements

        $folders = $packageInfos | where { $_.Flags -eq [Microsoft.SqlServer.Dts.Runtime.DTSPackageInfoFlags]::Folder }
        $packages = $packageInfos | where { $_.Flags -eq [Microsoft.SqlServer.Dts.Runtime.DTSPackageInfoFlags]::Package }
        $packages | Format-Table -Wrap -AutoSize -Property Name, VersionMajor, VersionMinor, VersionBuild
        $folders | %{
            GetPackageFromFolder (Join-Path $_.Folder $_.Name)
        }
    }
}
GetPackageFromFolder '\'