There are some post-apocalyptic books such as
>The City of Ember (series) by Jeanne DuPrau (I Haven't read it, but I've watched the movie.)
>The Forest of Hands and Teeth by Carrie Ryan (Haven't read this either, but it's supposedly good)
>Uglies by Scott Westerfeld (Luved the first book, can't wait to read the second!)
>The Girl Who Owned the City by OT Nelson
There's also a short story called The Lottery by Shirley Jackson and it's kinda like The Hunger Games, cause when I read the HG, i was like OMG it's like the Lottery! so yeah, you get my point.
here's also a list of books which I enjoyed ALMOST as much as the Hunger Games :D
>The Mortal Instruments by Cassandra Clare
>Maximum Ride by James Patterson
>The Keys to the Kingdom by Garth Nix
>Faerie Wars by Herbie Brennan
i also have a book blog w/ reviews n stuff :)
http://iliveforreading.blogspot.com/
and here's a site which gives recommendations based on what you like to read
http://www.whatshouldireadnext.com/
Enjoy!