Om

The Entity Embed module allows entities to be embedded in formatted text.

Bruker

Embedding media
This module, and the text filter that it provides along with the CKEditor integration, is especially suited to allow content authors to embed media in their textual content: images, video, and so on.
Embedding arbitrary content
As mentioned above, this module is especially helpful for embedding media in textual content, but it is not necessarily restricted to that; it allows any entity to be embedded. On an e-commerce site, you may want to embed products, on a company blog you may want to embed past projects, and so on.