Amazon Glacier is an extremely low-cost storage service ($0.01 per Gb per month) that provides secure and durable storage for data archiving and backup. It is optimized for data that is infrequently accessed and for which retrieval times of several hours are suitable.
In order to effectively use Amazon Glacier you need a client software.
This is where FastGlacier comes into play. Providing you an easy to use graphical interface to Amazon Glacier, it allows you to start using Amazon Glacier immediately, saving you time and money.