WP Inline Tweet
This plugin allows you to make phrases or sections of text within a post sharable through Twitter.
1. All you have to do is wrap the text you want to be sharable in a shortcode: [iShare]the text...[/iShare]
2. The text will appear to the reader with one of the a twitter icons appended to it. You can select from 8 options
3. When the reader clicks on that text they are give the options for sharing through a popup.
4. Sharable text is highlighted when the reader hovers it. There is an admin settings page to control the colors.
5. Once you have activated the plugin, simply click on the “WP Inline Tweet” menu to get started.