1.Twitter Buttons (http://www.twitterbuttons.com/) has very easy system for generating your own personalized Twitter button. You must enter your Twitter ID and press GO and there you go, you have a Twitter button!
2.TwiTip (http://www.twitip.com/181-twitter-buttons-badges-widget-and-counters-to-help-you-find-followers/) has listed 181 free Twitter buttons, badges and counters to find new followers.
3.Small Business CEO has made a compilation of links which offer over 300 Twitter follow me buttons. Check it out at http://www.smbceo.com/2009/05/04/300-free-twitter-buttons-and-icons/.
4.HongKiat has also made a list of beautiful Twitter buttons, check it out at http://www.hongkiat.com/blog/100-remarkably-beautiful-twitter-icons-and-buttons/.
5.Free Twitter Buttons (http://freetwitterbuttons.net/) works as Twitter Buttons – you must enter your ID to get a button.
6.TwitterButtons.org has also many beautiful Twitter buttons for your blog or website.
7.TwitterButtons.net offers wide variety of Twitter buttons.
8.Siah Design offers cute and artsy Twitter buttons at http://siahdesign.com/archives/150, some of them are animated.
9.Siah Design has also vector follow me buttons at http://siahdesign.com/archives/491.
10.http://www.twitter-buttons.com/ also has many beautiful buttons to get more attention to your Twitter.
11.Twitterfy (http://twitterfy.com/) offers black-and-blue coloured buttons for your website.
12.LimeShot Designs has made 35 beautiful follow me Twitter badges at http://limeshot.com/2008/follow-me-on-twitter-badges. They also have available Twitter backgrounds to go with the badges.
13.Sweet Tweet has selection of stunning Twitter follow me buttons at http://sweettweet.net/twitter-buttons.php.
14.Twt Buttons offers lots of cute Twitter buttons at http://www.twtbuttons.com/.
15.You can find many nice buttons here: http://www.linuxtuts.net/twitterbuttons/