afpy.barcamp was created to manage sessions and people registrations at PyCon FR 2008.
You can try afpy.barcamp on Linux (and maybe MacOs X) in an isolated sandbox. You first have to install Python 2.5 and Mercurial:
$ sudo aptitude install python2.5 mercurial
Then create the sandbox:
$ hg clone https://hg.afpy.org/afpy.barcamp/ $ cd afpy.barcamp $ python bootstrap.py $ ./bin/buildout
When it’s finished, you can run the application:
$ ./bin/zopectl fg
Then open http://127.0.0.1:8080 in your browser
The admin account is admin/admin. After login, just create an application in the Grok administration panel, click on the new application. Now you can create a new event and allow people to register.