Couple of aliases dealing with cards. These were made for blackjack.
The first is $addcards(value1,...,valueN) which adds the values of the cards, evaluating any letter other than an A to be a facecard (worth 10) and gives you the best possible hand value.
The second is $cardn(NumSuit) which, I don't know if anyone would consider useful, but takes input such as "2Hearts" or "JSpades" and converts it to "2 of Hearts" or "Jack of Spades". You can specify the .value property to make it evaluate the above two examples to "2" and "10", respectively, which is useful for providing input to $addcards.

alias addcards {
  var %x = 1,%o = $0,%g = 0,%aces = 0
  while ( %x <= %o ) {
    %i = $($+($,%x),2)
    if ( %i isnum ) {
      %g = $calc(%g + %i)
      inc %x 1
      continue
    }
    elseif ( %i != A ) {
      %g = $calc(%g + 10)
      inc %x 1
      continue
    }
    if ( $calc(%g + 11) > 21 ) {
      %g = $calc(%g + 1)
    }
    else {
      %g = $calc(%g + 11)
      inc %aces 1
    }
    inc %x 1
  }
  while ( %g > 21 && %aces ) {
    %g = $calc(%g - 11)
    dec %aces 1
  }
  return %g
}
alias cardn {
  if ( $prop == value ) {
    if ( A* iswm $1 ) {
      return A
    }
    elseif ( $left($1,1) isalpha || $left($1,2) == 10 ) {
      return 10
    }
    else {
      return $left($1,1)
    }
  }
  if ( $left($1,1) isalpha ) {
    if ( A* iswm $1 ) {
      return Ace of $right($1,$calc($len($1) - 1))
    }
    elseif ( K* iswm $1 ) {
      return King of $right($1,$calc($len($1) - 1))
    }
    elseif ( Q* iswm $1 ) [
      return Queen of $right($1,$calc($len($1) - 1))
    }
    elseif ( J* iswm $1 ) {
      return Jack of $right($1,$calc($len($1) - 1))
    }
    else {
      return 0
    }
  }
  else {
    return $iif($left($1,2) isnum,$left($1,2) of $right($1,$calc($len($1) - 2)),$left($1,1) of $right($1,$calc($len($1) - 1)))
  }
}