Autocompletes

Select2

A jQuery based replacement for select boxes.

Typeahead

A fast and fully-featured autocomplete library.

Tribute

A cross-browser @mention engine.
@rue74 Destroying things is much easier than making them.

At.js

Add Github like mentions autocomplete to your application.

And!! it support ContentEditable mode too!!

Try here now! emoji :w mention @a issue #

Password Strength `meter`

Low-Budget Password Strength Estimation.

Text Mask

It can create input masks for phone, date, currency, zip code, percentage, email, and literally anything!