ajayver

This plugin gives you the ability to change the appearance of your RSS feed. You can easily add images from custom fields, read more link, category list, tag list and any custom code before or after the feed items. Also, the plugin allows you to delay feed publication for several minutes. It is helpful, when you made some mistake and you will have time to fix it before the post went to RSS and all other services like facebook or twitter.

RSS Manager

This plugin gives you the ability to change the appearance of your RSS feed.

Rene Maurer

This plugin hides the text that is defined between the simple Shortcode. By clicking on the user-defined link, the hidden text becomes visible. It works via a Shortcode and can be placed everywhere!

Usage: [show_more more=”TEXT” less=”TEXT”] Content [/show_more]
You can use some parameters like: 
– more=”show more” 
– less=”show more” 
– color=”#0066CC” 
– list=”»” 
– align=”left” | “center” | “right” 
– size=”120″

WP show more

I have tried other plugins 'read more' plugins but ended up with frustrations.. Only this one works - simple and fast. If you are looking for read more plugins, don't bother with others, just install this one. 

Don't bother with other plugins! Just install this one!

Hide the Text between a simple Shortcode.

RSS Manager vs WP show more