A1 SD Bench is a free tool (free as in beer). Use A1 SD Bench to benchmark your phone & tablet SD cards, RAM and memory, to test IO read / write speed and media performance, and compare your benchmark results online. All devices with Android 2.2 and above are supported.
More info at Google Play.
In case you do not have an Android phone or tablet, you can use online CPU benchmark that we have released earlier — SilverBench.