These awesome plugins listed below will allow you to count the characters or words in a given text area or text box. You may have seen the twitter message box has this feature to indicate the text/word length.
Completely customizable jQuery plugin that allows showing the remaining character count in the text area.
2)Word Counter for Textarea
This jQuery plugin uses as word-counter for the text area. It only counts the words, not the character.
Is a simple jQuery character counter plugin that easily adds a counter to any input field. It works with both textareas and text fields
4)jQuery Simply Countable
jQuery plugin that provides a character counter for any text input or textarea.
5)Show Character Limit
jQuery plugin to display interactive character limit feedback about a text field or textarea.