Frontend Registration – Contact Form 7 – PRO
We have created same like one add on for contact from 7 in which you can convert contact from 7 into registration form or signup form for WordPress user
Frontend Login – Contact Form 7
Using this plugin you can create login form by which registered user will be register as a subscriber role in WordPress.
Donate Your Price – WooCommerce
The Donate Your Price plugin lets you be flexible in what price you are willing to accept for both shop and selected products.