jQuery.dotdotdot is a library for beautifying ugly multiple-line content.

The plugin simply truncates the excess text; basically, it’s like using overflow:hidden, but with extra features.

Different layouts are also supported, and, among the few options, dotdotdot features events and monitoring the content for changes (sweet).

dotdotdot is a nice plugin with a slick markup, and almost every comprehensive website needs such functionality at one stage or another.

• Website: http://dotdotdot.frebsite.nl/

jQuery File Upload is a comprehensive file upload kit that works in most server-side environments.

The most notable features include:

• Multiple file upload;
• Drag & Drop support;
• Cross-site file uploads;
• Resumable and cancelable uploads.

The library was built purely with jQuery and Twitter’s Bootstrap.

Overall, jQuery File Upload provides a surprisingly comprehensive file uploading interface, suitable for most backends and applications.

• Website: http://blueimp.github.com/jQuery-File-Upload/

Slides is a simple and effective presentation framework written in JavaScript.

It uses curl.js for transitions and requirejs for loading slides and other dependencies.

The one and only question is — why use this framework instead of PowerPoint or Keynote?

The developer says that he made this framework because he “Got fed up with using Powerpoint and Keynote to make and give presentations.”

However, there are also some practical reasons for choosing this framework:

• Easy slide linking with a working “back” button; 
• Linking between slides easily; 
• Mobile support; 
• Worldwide availability of your presentations.

• Website: https://github.com/briancavalier/slides

jurlp.js (jQuery URL Parser) is a library for parsing, manipulating, filtering and monitoring URLs, as well as creating anchor elements from URLs found in HTML/text.

What’s great about jurlp is that it treats URLs both as strings and as objects, allowing for advanced URL manipulation and monitoring.

The library is well-documented and, it seems, has gained quite a popularity at GitHub with 155 watchers.

• Website: http://tombonner.github.com/jurlp/doc/files/jurlp-js.html

jPlayer is a new fancy library for adding HTML audio and video elements with jQuery.

jPlayer features a powerful API for managing both audios and videos; it is extendable as well — and all that at just 8kb.

There is a fallback to Flash, and the library also has some plugins for configuring it to special needs.

What speaks in favor for jPlayer, though, is its well-written documentation and the active community.

• Website: http://www.jplayer.org/
• Demo: http://www.jplayer.org/latest/demos/

Kalendae is a dependency-free calendar library that interacts with jQuery as well.

Kalendae is a rather thorough plugin and uses moment.js for date manipulations.

The calendars created with Kalendae can be attached to any element, even an unnamed one, and is fully stylable with CSS.

Kalendae’s instances can have blacked-out dates, preselected dates, and so on; plus, the library provides a thought-out callback system that’s very useful for complex operations regarding data.

• Website: https://github.com/ChiperSoft/Kalendae
• Demo: http://chipersoft.github.com/Kalendae/