validator.js is a library of string validators and sanitizers. It can be used both on client side and server side.
microlight.js is a micro-library which improves readability of code snippets by highlighting, for any programming language, yet without attaching additional language packages or styles
Trix is a WYSIWYG editor for writing messages, comments, articles, and lists—the simple documents most web apps are made of. It features a sophisticated document model, support for embedded attachments, and outputs terse and consistent HTML.
Jodit Editor is a beautiful and functional WYSIWYG HTML text editor with file browser out-of-box.
It's free for non-commercial use.
Kajero notebook is just a Markdown document with a script attached. Kajero is designed to make it really easy for anyone to create good-looking, responsive, interactive documents.
A simple and nice random quote machine created by using jQuery and JSON.
InlineTweet.js allows you to easily create tweetable links out of any text on a webpage. Just wrap the tweetable text in a container with
data-inline-tweet and it's ready.
jQuery.mark is a jQuery plugin to highlight text with diacritics, synonyms, custom elements, custom class names, separate word search (multiple terms), filter selectors, word boundary and iframe support. Compatible with DataTable.
Balance Text is a jQuery plugin for implementing balancing of wrapping text in a web page.
jQuery TextFill is a jQuery plugin resizes text to make it fit into a container. The font size gets as big as possible.
characterCounter is a jQuery plugin to show limitation about your message characters.