You might have seen this feature in Wikipedia. It shows a random article button that allows you to quickly jump to a random article. You can add this feature in your WordPress site by following two simple steps, it makes your blog more engaging.
Know about easiest methods for displaying Google+ Add To Circle button on your Website.
If you don’t want WordPress default recent posts widget to show all categories then try this widget plugin, using it you can show recent posts on your sidebar widget from selected categories.
Wunderground.com gives most accurate and in-depth weather information. They’re also not evil corporate giants, and are weather geeks. This plugin uses the Wunderground API to gather its accurate forecasts. It uses 10 great-looking icon sets.
Make your WordPress sidebar float. Make it follow your readers so that everytime they scroll down your sidebar floats with them to the footer, with content and your blog gets more symmetry.