Easily create a random string (or secure password) using PowerShell. Add to your PS profile

Get-RandomString.ps1

function Get-RandomString {
  param (
    [CmdletBinding(PositionalBinding=$false)]
    [Parameter(Position=0)]
    [ValidateRange(8, 256)]
    [int] $Length = 20,
    [Parameter(Position=1)]
    [validateset("AlphaNumeric", "SQLCompliant")]
    [string]$Compliancy
  )
  $Characters = [char[]](65..90)      # A..Z
  $Characters += [char[]](97..122)    # a..z
  $Characters += [char[]](48..57)     # 0..9
  Switch ($Compliancy){
    "AlphaNumeric" {
    }
    "SQLCompliant" {
      $Characters += [char[]](33)     #!
      $Characters += [char[]](35..37) # #$%
    }
    default {
      $Characters += [char[]](33..47) # !"#&%'()*+,-./
    }
  }

  if($PSVersionTable.PSVersion.Major -eq 5) {
    $Password = @()
    For ($i = 0; $i -lt $Length; $i++) {
      $Password += $Characters | Get-Random
    }
  } else {
    $Password = @()
    For ($i = 0; $i -lt $Length; $i++) {
      $Password += $Characters[[System.Security.Cryptography.RandomNumberGenerator]::GetInt32($Characters.Count)]
    }
  }
  return -join $Password
}

Added a PowerShell version check (5.1 uses Get-Random) and fixed [char] ranges which didn't work in PS5.1.