Rectus Inc.

A plugin for convenient tag management. 
When posting, any tags that exist on the page will be automatically registered. 
You can also register or delete tags for all pages at once.

Rectus Auto Tagging

If a tag exists in a page at the time of submission, it is automatically registered. Tags can also be registered or deleted for all pages at once.

Jeff Sherk

Julien Laumond

This plugin has the following great features:
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Auto-login: When a new user registers, this will automatically log them in right away.
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Redirect: Choose the web page you want them to be redirected too after they register and are auto-logged in.
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Independent options to add Password field to new user registration form, so users can create their password during registration instead of having to wait for an email and clicking the link in the email.
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Independent options to add First Name field and/or Last Name field to registration form.
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Independent option to disable the annoying admin notification emails about new user registrations. User will still receive their email about how to setup their password.
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Independent option to disable the annoying admin notification emails about users lost/changed password. User will still receive their email about how to reset their password.
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Auto Login New User After Registration

Automatically login new user right after they have registered. Add Password field to registration form. Disable admin notification emails of new user  …

Rectus Auto Tagging vs Auto Login New User After Registration