Because Twitter removed all tweet count information, this tool is no longer available..

Twitter Retweet Tool.

Use this tool to check the number of times a URL is retweeted / shared on Twitter. The retweet count indicates how your visitors appreciate and interact with your content. You can get the Tweet count for multiple URLs using the Tweet share count checker and export the results to .CSV.

Add a Tweet button to your website

Twitter offers “developers” the ability to easily generate share buttons. Some interesting button parameters:

data-url=”The URL of your website”
In most cases you don’t need this parameter, because you like twitter to extract the page URL dynamically.
data-via=”SEOReviewTools”
Specify the twitter user name, this will be formatted as a clickable link inside the snippet (@SEOReviewTools)
data-size=”large”
Use the data-size parameter to specify the size of the share button.
data-count=”none”
Set the data-count parameter to none to hide the tweet count bubble. The data-count parameter is set to show the tweet count by default.
data-hashtags=”SEO”
Use the data-hashtags and add a default hash tag to the retweet snippet. You can add multiple hashtags.

For more info go to https://twitter.com/about/resources/buttons#tweet