Skysa

A Scroll-to-top button for scrolling up to the top of the current page. Customize the label and icon used for the button. When the app button is clicked the page scrolls to the top with a smooth eased animation. The Scroll-to-Top button displays on a Skysa bar at the bottom of your site.
http://www.youtube.com/watch?v=Zj1uGXX2xrk&hd=1 
<a href="https://wordpress.org/extend/plugins/tags/skysa-apps" rel="ugc">More Skysa App plugins</a> -|||- <a href="https://wordpress.org/extend/plugins/skysa-official/" rel="ugc">Skysa App Bar Integration plugin</a>

Skysa Scroll-to-Top App

Animated scroll-to-top, button floats unobtrusively at the bottom of your site. A great convenience feature for your visitors.

Promote your Twitter account at the same time while driving traffic to your website. Customize the default Tweet, set what URL to share in the tweet and set the option to show or hide the tweet count next to the tweet button. By allowing your site visitors to tweet about your site on their twitter accounts, it will help get the word out about your site and drive targeted traffic from twitter users who see the tweets directly to your site.
http://www.youtube.com/watch?v=Zj1uGXX2xrk&hd=1 
<a href="https://wordpress.org/extend/plugins/tags/skysa-apps" rel="ugc">More Skysa App plugins</a> -|||- <a href="https://wordpress.org/extend/plugins/skysa-official/" rel="ugc">Skysa App Bar Integration plugin</a>

Skysa Tweet App

Let people share content on Twitter (a Tweet) without having to leave your web page. This app displays a Tweet button at the bottom of your site.

Skysa Scroll-to-Top App vs Skysa Tweet App