Corteous.ly

Corteous.ly allows its users to let their contacts know how overloaded they are with their e-mails. Just attach it with your Gmail account and then it provides you with a link that you can include in your signature. When your contacts click it, they’ll see how much e-mail load you’ve got. You can also customize what’s a low, normal or high e-mail load for you and then choose what you want to be monitored: unread messages, total e-mails on your inbox or how much e-mail you’ve sent recently.