Various social networks today use a common ploy to garner a larger audience: ask the user to create a new account (or even showing this function to old) who log in to your account email and send mass invitations to your list contacts. But not everyone likes to put your login information on another site, for security reasons.
To ease the mind of such people paranoid security, The Google released this week an update to the API Gmail which now allow third-party application developers to use OAuth authentication to log in to the service. This type of authentication is the same used by Twitter for some web-based applications on the social network. Developers who want to implement this new feature in their applications can check the full documentation on this link.
In addition, Google engineers are also working with companies like Mozilla and Yahoo to create a standard that will allow the use of too IMAP and SMTP with OAuth. The mailing list on the topic is available on this link.