This tool will analyze your account and based on your followers tell you when the best time to tweet is. You might be surprised by the findings. I know I was.
This tool gives you a free report of any Twitter hashtag. On the day I checked #digitalfirst, it showed that 17 tweets with that hashtag generated 35,231 impressions and reached an audience of 32,969 followers in 24 hours.
This tool is also a great way to find people to follow (check @mention in tweets)
A great place to find experts on Twitter in particular fields.
Use this tool to check Retweet stats. For example, I checked my Reweet stats on this Twitter post:
“Finding Their Way Out” named finalist in#EppyAwardshttp://t.co/K9iaint8#digitalfirst @JXpaton
This tweet was retweeted 4 times and reached 4,225 users.
Enter Twitter username and get a bunch of cool stats. Also will show you your tweet cloud and hash cloud, just for fun:)