Open House App is an Offline database (no WiFi or Internet connection required) to capture Registration Information at events like "Open House" and other such campaign.
Details of people registering at the "Open House" event can be exported as an XML / TEXT file and emailed to an Application like Salesforce eMail Service.
A sample SF.com package can be accessed from the Support page.
This App provides a "kiosk" mode ("Lock List" setting of App). When this is enabled, one can only add new Registration and not browse / search the list of registrations.