zachs

Visit any post or page on your site and see a progress bar as you scroll. It completes when you reach the bottom of a post.

WProgress

This plugin adds a small progress bar to the top of every wordress post page.

farinspace

This plugin allows you to show and hide specific portions of content within a post or page. Visitors can then use custom show/hide links to show or hide the portions you’ve defined. The plugin enables a few WordPress shortcodes: <code>[peekaboo]</code>, <code>[peekaboo_link]</code> and <code>[peekaboo_content]</code>.
To learn more read the <a href="http://farinspace.com/wordpress-peekaboo-plugin/" title="Peekaboo extended documentation" rel="nofollow ugc">extended documentation</a>.

Peekaboo

This plugin allows you to show and hide specific portions of content within a post or page. Visitors can then use custom show/hide links to show or hi …

WProgress vs Peekaboo