Javascript libs that offer basic subset of jquery features

http://dustindiaz.com/qwery

http://sizzlejs.com/

https://github.com/ded/bonzo

bonzo.aug({
    param: function () {
      var str = [];
      obj = this.data();
      for(var p in obj)
         str.push(p + "=" + encodeURIComponent(obj[p]));
      return str.join("&");
    }
})

querystring encoding of a javascript object