You can choose a different header image to show up according to your content. WP Display Header plugin lets you do this in a very easy way, you can select a custom header image while creating a new page, post or custom post type.
This tutorial is on usage of a powerful and very popular WordPress plugin that lets you add the first image of a your postto your feeds, even if you are only displaying post excerpts.
Post Snippets is a popular WordPress plugin that allows you to easily create a library of Text, HTML or PHP code touse inside your blog posts, pages and other custom post types etc. All created snippets can be used directly from WordPress Visual Editor using its button. You can as many snippets you want and even you can export and import them to you in other WordPress sites you own.
Jeff Starr‘s WordPress plugin Show Support Ribbon allows you to display a customizable “support” ribbon, banner, or badge on your website.
Allow custom fields in selected BuddyPress Groups, create various types of custom fields like radio buttons, select, input, text area etc, edit fields data, show or hide pages where fields will be displayed, reorder fields, create custom group pages using WordPress RichEditor and more using BuddyPress Group Extras.