I'm very happy using WordPress, but for a new project I would like to implement WordPress so that the main website shows the articles and pages of wordpress asigned to it and show a other articles and pages on a second website, using one installation of WordPress. So ideally I want to be able to set a checkbox for each page/article where it should appear.
I found some old articles on this kind of issue on the forum, but I'm hoping WordPress already developed so much it would be possible now.
Is there already something like that out there? Or can anyone tell me how I could achieve this?