Fine grained control of how many of your posts appear on each of the various WordPress archive pages.
Custom Posts Per Page Reloaded provides a settings page in your WordPress admin that allows you to specify how many posts are displayed for different …
Custom Posts Per Page provides a settings page in your WordPress admin that allows you to specify how many posts are displayed for different views.
Posts per page for custom post types and taxonomies.
This plugin allows to configure the number of posts displayed for every custom post registered.