This plugin can be used to generate short links for your WordPress posts, pages, or any available custom post type that you would like it to interact with.
This the GitHub development repository for the WordPress plugin found here.
Use the Bitly API to generate shortlinks for all of your posts and pages instead of the internal http://www.yourdomain.com/?p=1 short links WordPress generates.
This plugin can be used to generate short links for your WordPress posts, pages, or any available custom post type that you would like it to interact with.
https://wordpress.org/plugins/wp-bitly/
GNU General Public License v2.0