This plugin allows you to create many-to-many relationships between posts of any type: post, page, custom etc. A few example use cases: manually curated lists of related posts post series products connected to retailers etc. Additionally, you can create many-to-many relationships between posts and users. So, you could also implement: favorite posts of users multiple authors per post etc. Support & Maintenance I, scribu, will not be offering support (either free or paid) for this plugin anymore. If you want to help maintain the plugin, fork it on github and open pull requests. Links: Documentation | Plugin News | Author’s Site