JUVOJustin

You love WSFrom and already use the user management add-on? Than this plugin will become handy. It connects the forms with the nativ login system. 
The password reset url as well as the login url are automatically changed to your forms pages once set up.

JUVO Login for WS-Form

Integrates WS-Forms into the WordPress login system.

Pippin Williamson

Modifies the Empty Spam action in WordPress to process the spam deletion in batches, allowing you to delete thousands or even hundreds of thousands of spam comments at once without killing your server.
Have you found a bug or have a suggestion or improvement you’d like to submit? This plugin is available on <a href="https://github.com/pippinsplugins/batch-comment-spam-deletion" rel="nofollow ugc">Github</a> and pull requests are welcome!

Batch Comment Spam Deletion

Modifies the Empty Spam action in WordPress to process the spam deletion in batches instead of all at once.

JUVO Login for WS-Form vs Batch Comment Spam Deletion