The Stumble Upon It! Wordpress plugin allows your visitors to submit your blog posts to StumbleUpon.com’s bookmarking service.

Plugin Name: StumbleUpon It!
Description: Easy plugin that allows your visitors to submit your blog posts to StumbleUpon.com.
Version: 0.1
Author: Andrew dela Serna
Homepage : http://www.alleba.com Plugin Page

1. Download the plugin from http://www.alleba.com/blog/wp-downloads/stumbleupon-it.zip
2. Extract and upload the contents of the archive to ‘yourserver.com/wp-content/plugins/stumbleupon-it/’
3. Login to your Wordpress admin panel and browse to the Plugins section.
4. Activate the StumbleUpon It! plugin.