WordPress Easy Index is changed to WordPress Easy Contents. Go to the plugin page to download it:
http://wordpress.org/extend/plugins/wordpress-easy-contents/
For example:
You write a post with several h2 headings. When I've written a long post with a lot of h2 headings I always added manually a short table of contents with anchor links to the headings at the top of the post. A long time consuming process and I'd rather do it automatically: with WordPress Easy Contents.
See this example in the post about Easy Index on my blog.
http://crispijnverkade.nl/blog/wordpress-easy-contents