Dominik Schilling

Every time you edit and save a post the page will be reloaded. That means all scroll positions will be resetted. 
Not really UX friendly.
This plugin recovers the old scroll position in your Editor after saving. Either HTML or visual editor.
Sounds pretty good? Install now!
<h4>Feedback</h4>
If you want, you can drop me a line @<a href="http://twitter.com/ocean90" rel="nofollow ugc">ocean90</a> on Twitter or @<a href="https://plus.google.com/u/0/101675293278434581718/" rel="nofollow ugc">Dominik Schilling</a> on Google+.
<h4>More</h4>
Try also some of my <a href="https://profiles.wordpress.org/users/ocean90" rel="nofollow ugc">other plugins</a> or visit my site <a href="http://wpgrafie.de/" rel="nofollow ugc">wpGrafie.de</a>.

Preserve Editor Scroll Position

Recovers the old scroll position in your Editor after saving. Either HTML or visual editor.

Ben Balter

paul.irish

beaver6813

Infinite scroll has been called autopagerize, unpaginate, endless pages. But essentially it is pre-fetching content from a subsequent page and adding it directly to the user’s current page.
When a user scrolls towards the bottom of the page, the next page of posts is automatically retrieved and appended. This means they never need to click “Next Page”, which dramatically increases stickiness.
Features:
<ul>
<li>Works out-of-the-box for many popular WordPress themes — just activate the plugin and scroll</li>
<li>Fully customizable to adapt to your site and theme</li>
<li>Requires no (hopefully) template hacking, only a knowledge of CSS selectors.</li>
<li>Relies on shared database of common themes to simplify installation process</li>
<li>Maintain local database of theme presets for all installed themes (shared across network on multisite installs)</li>
<li>Countless API endpoints to modify the behavior.</li>
<li>Backwards compatible: Will not break RSS readers, mobile devices, or browsers with javascript</li>
</ul>
Full information on <a href="http://www.infinite-scroll.com" rel="nofollow ugc">infinite-scroll.com</a>

Infinite-Scroll

Automatically append the next page of posts (via AJAX) to your page when a user scrolls to the bottom.

Preserve Editor Scroll Position vs Infinite-Scroll