A simple 'related posts' plugin that lets you select related posts manually.
People who want to list 'related posts' in their blog posts or pages, and want to choose the related posts manually themselves.
Data is stored in the existing postmeta table in the WordPress database. No additional tables are created.
As many as you like, there's no limit.
There are 2 things that are done or possible. By default, the plugin will split the select boxes into max 50 posts, so it's easier to handle for the user. Also, you can select on the Options page to not list all post types. This will trim down the number of posts that are listed.
All data remains in the database when the plugin files are deleted through the plugins page in WordPress. So if you accidentally delete the plugin, or if you decide to install it again later, your data should still be there.
Yes, it is again actively maintained.