Topify: Twitter Follow, Unfollow, Reply, Block by Email
Topify is a free service that replaces Twitter emails by more powerful and informative emails. You can follow, unfollow, and reply from email
Posterous: Create Free Webpage by Just Sending Email
Posterous lets you post any content online by just sending an email. You can add text, video, music, photos, and documents to that email.
TweetSwitch: Send and Receive Tweets from IM and Email
TweetSwitch is a free online service that lets you send and receive tweets using Yahoo Messenger, Gtalk, AIM, Skype, Windows Live Messenger, Email
Btween.Us: Post to Facebook and Twitter From Email
Btween.Us lets you update your Twitter and Facebook status by just sending an email. Ideal for use in office.
