http://github.com/idlesign/django-sitegate

django-sitegate is a reusable application for Django to ease sign up & sign in processes.

This application will handle most common user registration and log in flows for you.

Sign in

• username/e-mail + password
• username + password

Sign up

• username/e-mail + password
• invitation code + username/e-mail + password
• username + password
• username + e-mail + password
• username + password + password confirmation
• username + e-mail + password + password confirmation

• Add the sitegate application to INSTALLED_APPS in your settings file (usually 'settings.py').
• Make sure TEMPLATE_CONTEXT_PROCESSORS in your settings file has django.core.context_processors.request.

Here follows the most straightforward way possible with django-sitegate to have both sign up & sign in functionality on your page.

1. Use sitegate_view decorator to mark your view as the one handling both signups and signins:

   from django.shortcuts import render
   
   from sitegate.decorators import sitegate_view
   
   @sitegate_view  # This also prevents logged in users from accessing our sign in/sign up page.
   def entrance(request):
       return render(request, 'entrance.html', {'title': 'Sign in & Sign up'})

2. Then in your template load sitegate tag library and put sitegate_signup_form & sitegate_signin_form tags in place where you want a registration and sign in forms to be.

   {% extends "_base.html" %}
   {% load sitegate %}
   
   {% block page_contents %}
       <div class="my_signin_block">
           {% sitegate_signin_form %}
       </div>
       <div class="my_signup_block">
           {% sitegate_signup_form %}
       </div>
   {% endblock %}

You're done. Now your site visitors have an e-mail + password form to register and username/e-mail + password form to log in.

And mind that we've barely made a scratch of sitegate.

http://django-sitegate.readthedocs.org/