A Feeds + Feeds Tamper plugin that resolves strings pulled in from feeds importers and maps them to Drupal entity IDs, so they can be used as entity references.
Adds support for freeform Entityreference linking when using Feeds.
This means that you can pull in a string label from a feeds source (eg venue="Smithtown velodrome"), and if you have a local node (or user or other entity) that matches that string, it will use entityreference to create a link.
Unlike the others, this does not require that ALL your linked nodes are owned by Feeds importers, only the ones you curate yourself.
The automated lookup (conversion of string to entity ID) can be done either fully automatically (title match) using the entityrefererence autocomplete search, or fully customized, by using views.
Although built around feeds_tamper where it can be fully configured, you can also just use it without the feeds_tamper module dependency if you are content with a best-guess string-to-title match (no options).