just playing with things up to base90 :P

toy hash.coffee

hash = (() ->
  _alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!#$%&()*+,./:;<=>?@[]^_`{}~"'
  toNum = (c) -> if (_alphabet.indexOf c) == -1 then '' else _alphabet.indexOf c
  (text, salt) ->
    str = (text + salt).split ""
    hashed = (str.map (c) -> toNum(c) << 0x501).join ''
    return (hashed * 1).toString(36)
)()

toy hash.js

var hash = (function() {
  var toNum, _alphabet;
  _alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!#$%&()*+,./:;<=>?@[]^_`{}~"';
  toNum = function(c) {
    if ((_alphabet.indexOf(c)) === -1) {
      return '';
    } else {
      return _alphabet.indexOf(c);
    }
  };
  return function(text, salt) {
    var hashed, str;
    str = (text + salt).split("");
    hashed = (str.map(function(c) {
      return toNum(c) << 0x501;
    })).join('');
    return (hashed * 1).toString(36);
  };
})();