Inputfield Textarea allows using the tab-key to type tabs in a textarea. Prevents switching the focus to the next input.
Inputfield Textarea Tab Key
Processwire Inputfield which allows using the tab key to write tabulators in an Inputfield. Disables switching focus functionality of the tab key. Use the mouse to get to the next input. Doesn't respect accessibility guidelines.
Install and use modules at your own risk. Always have a site and database backup before installing new modules.