tweet buttons from twitter

share things online via twitter http://abeeng.blogspot.com/2008/09/twitter.html.
Now the twitter has - own tweet button, (http://blog.twitter.com/2010/08/pushing-our-tweet-button.html)
Tweet buttons are at http://twitter.com/goodies/tweetbutton

Like - wordpress

Wordpress adds a new feature at the bottom of the blog post, called 'like', and when is clicked shows the gravatar of the blogger who likes the post.

More from http://en.blog.wordpress.com/2010/08/03/like-a-post/