The popular "Post Page Associator" Plugin was completely rewritten and relaunched. There is a new design, a new user interface and the most important change, the new name: "Associated Posts". The old version Post-Page-Associator will be discontinued and there will be no more support or updates available.
For Associated Posts there is a free Lite Version and a Pro Version with some premium features. You can download the Free Version from WordPress.org here.