RemoteDroid allows you to access your Android phone remotely using another mobile device. Even a non-Android phone!

It gets you notified when you receive a call or a message.
It receives your messages.
It can access your contacts.
It can access your Inbox, even your unread messages.
It can access your Calendar.
It can get the location of your Android phone.
It can set your phone's ring volume and screen lock.
It forwards your call.
It sends (SMS) text messages from your phone even when your phone is not with you.