Zenbe is an online service that provides you with a single window access to multiple e-mail accounts as well as Facebook and Twitter. After signing up for an e-mail account with Zenbe, you can easily set up your Zenbe account to access your e-mail accounts at Gmail, Yahoo, AOL or Hotmail.

To attach an existing gmail, yahoo , aol or hotmail account, sign in to your Zenbe account and go to settings and then under Linked Email Accounts, click on add new.

It’ll then ask you to enter your e-mail address and then password of your e-mail account and you can also set it up to use a tag to identify e-mails recieved on this account.

You need to have POP access enabled for your email accounts if you want to access it via Zenbe. When you’re finished adding information, click  on Save this Account. Zenbe will send a confirmation code to your newly linked e-mail account.

After confirmation, now you can access your e-mail account from Zenbe. You can also use it to access multiple accounts of same provider like accessing multiple gmail accounts etc.

Zenbe also lets you access Facebook, twitter and Google talk so that you stay in touch with your friends from only a single window. Right sidebar contains tabs that let you access these sites.

The main catch in this service is that it uses POP to access your mail account which does not synchronize your e-mail account with mail server.

Despite the above drawback, Zenbe is quite useful as it provides a single window access to all your mail accounts, chat on Google Talk and social networking on Facebook and Twitter.