Ever wanted to learn another language?  I've heard of apps such as Rosetta stone, but they are costly and pretty boring to use.  Duolingo was recently voted as the top language learning tool by lifehacker.com readers.  I'm sure it had a lot to do with the price of FREE.  Also, Duolingo is good at delivering content in a fun and engaging manner.  Despite only having six languages its still worth a look if you are looking to brush up on your second language.