more – The unofficial WordPress Plugin Directory

ActionPress

Replace the […] more link with custom text for each post, creating a specific call-to-action.

Auto sets the more tag to post title if no custom text has been set.

This plugin will show the first post with its full text but all the others with the text after the "more" tag

In-Post Template plugin add additional content to posts and pages, inside the_content() data result.

This plugin will cut your RSS feeds at the 'more' tag or custom [rss-cut] tag and optionally append a footer to each article on your RSS fee …

Prevents WordPress 2.1+ from adding a more link to your website's feed.

Removes the anchor from the permalinks ("read more"-links), so you don't jump halfway down the page.

Change the (more…) link so that it jumps to the entire post, not just just the part after the (more…).