Moo'd Tweet is an online diary for Twitter users. Track and rate your Moo'd Tweets.. Moo'd Tweet is an online diary for Twitter users. It's totally free to use. It enables you to tweet within the site and rate it on a Scale of 5 depending on your mood. You can later return back to view them whenever you wish. You can organise and rate your Moo'd Tweets. Keep your diary private, or share it with the herd... It uses oAuth so its safe to use it.