Copyme is a very useful jQuery plugin which allows the user to copy the entire textarea to clipboard by one click.
jQuery Plugin For Smooth Auto-expanding Textarea - autoexpand
jQuery Plugin To Display Line Numbers In Textarea - numberedTextarea
jQuery Plugin To Create Textarea With Line Numbers - SetNumber
Copy Entire Textarea To Clipboard Using jQuery - Copyme
jQuery Plugin To Limit Number Of Lines In Textarea - textareamaxrows
jQuery Plugin For Auto Tabbing On Text Fields - Auto Jump
jQuery Plugin For Auto Grow Of Textarea On Typing - autoresize
Drawer-style Expanding Textarea Plugin For jQuery - textDrawer.js
Show Line Numbers In Textarea - jQuery bcralnit.js
jQuery Plugin To Auto Copy Text From One Field To Another - autofill
Cross-browser Textarea Maxlength Plugin - jQuery maxlength.js
jQuery Plugin To Create Textarea With Line Numbering - LineNumbers
Tiny jQuery Plugin To Highlight Text In Textarea
Textarea Character/Line Count And Limit Plugin - jQuery textArea.js
jQuery Plugin To Highlight Text In Text Fields - highlightTextarea
Accessible Clear Button For Text Fields - jQuery vamoose
Auto Grow Textarea Vertically To Fit Content - textAdjust
Auto Grow Textarea While Typing - jQuery Autobox
Check If Input Or Textarea Value Matches A String - jQuery Field Compare String
Twitter Like @Mentions Auto Suggesting Plugin with jQuery - Bootstrap Suggest
Make Textarea Height Fit Its Content - jQuery autoSized
Textarea Character Limit With Counter And Countdown Bar - jqtarea
Add Line Number In Textarea - jQuery LinedTextArea