Shimmy States is a free Chrome add-on developed by Reed Kavner. It falls under the category of browsers and specifically belongs to the subcategory of add-ons and tools. This add-on is designed for election enthusiasts who enjoy following the polls and forecasts.

With Shimmy States, users can experience a unique interactive feature while exploring the FiveThirtyEight forecast map. As you hover over a blue state on the map, you will witness Hillary Clinton's shimmy. The shimmy is directly proportional to her lead in the polls and forecast. The greater her lead, the more pronounced her shimmy becomes.

It is important to note that Shimmy States is not affiliated with or endorsed by FiveThirtyEight or Hillary Clinton. However, it is created by a fan who appreciates both entities. This add-on provides a fun and engaging experience for users who are interested in the 2016 election forecast.