This translation is machine-generated and pending review.
Single-page (One Page) sites are being widely used for projects that have lean content and a reduced structure, becoming a great alternative to present information in a simple and objective way. There are several open source plugins that can help you in this endeavor; they offer many features such as animation and functionality for fixed menus and presentations.
Fullpage.js
FullPage.js is a simple and easy-to-use plugin to create horizontal and vertical scrolling sites. Designed to support responsive designs, it makes it my favorite on the list. 
One Page Scroll
Perfect for creating presentation sites. 
Smint
A simple plugin that makes navigation easier on one page sites. 
Stickup
A simple plugin that sticks the navigation bar when the scroll passes by it. 
jQuery Scroll Path
A crazy plugin that lets you make your own scroll path; if anyone manages to make a cool design with this plugin please send me the case! 
Recommendation
One Page Love is a very good site for those looking for ideas and references for one page style site design. In addition to a huge collection of sites, it has a section to buy templates in the same design line.