multi.js is a user-friendly replacement for select boxes with the multiple attribute. It is mobile-friendly, easy to use, and provides search functionality. multi.js is also easy to customize and style with CSS.
A morphing dropdown that animates according to the size of its content by using css and jQuery as seen on stripe.com website.
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.
formBuilder is a jQuery plugin for drag and drop form creation.
superplaceholder.js is a library to bring your input placeholders to life by cycling multiple instructions in a single input placeholder.
A tutorial about creating custom accessible & skeuomorphic checkboxes and radio buttons with jQuery and CSS.
jQuery FileStyle is a jQuery plugin to create file inputs with custom styles. You can use this plugin to personalize your input file and let the beautiful.
A tutorial about creating custom select box by using css and jQuery.
inputTags.js is a simple jQuery plugin allowing to add, edit or remove tags in a tags list.
Select2 Bootstrap CSS is a simple css to make select2 widgets fit in with Bootstrap.
Selectivity.js is a modular and lightweight selection library for jQuery and Zepto.js.