superann

This plugin adds a “Stick this to the front page” checkbox on the admin add/edit entry page of selected custom post types.
Set options to enable in Settings → Reading. Unless you’re using custom queries to display your sticky posts, you probably want to check the option to add selected post types to the blog home.
Note: Sticky custom posts are stored in the global ‘sticky_posts’ option field, just like regular posts.

Sticky Custom Post Types

Enables support for sticky custom post types.

jaschaephraim

There are no settings or custom functions. Set custom post types to be sticky just as you would with regular posts, and those post id’s will be included in the result of <code>get_option( 'sticky_posts' )</code>.
PLEASE NOTE In order to integrate as seamlessly as possible, this plugin will not alter any queries or filter any functions. If your sticky posts aren’t appearing the way you want, there’s probably a good reason in your query (Is <code>ignore_sticky_posts</code> set to <code>true</code>? Is <code>post_type</code> set to a different type?). This plugin may be most appropriate for developers who just want the native sticky post UI and no other superfluous features.
If you find this plugin useful, please rate it accordingly.

Seamless Sticky Custom Post Types

Perfect

Great plugin! Hasn't been updated for over three years. But it works great, still!

Still works like a dream

Extends the native sticky post functionality to custom post types in a way that is identical to default posts.

Sticky Custom Post Types vs Seamless Sticky Custom Post Types