XTools/Blame

The Blame tool lets you find edits made to a page that added the given text. This can be used, for example, to identify who added vandalism to a given article.

From the main form, you can run Blame against the latest revision, a specific revision ID, or a date.

This tool is powered by.

Summary
Summarizes the requested data.

List of edits
Each edit has a heading with the timestamp. The timestamp is a link to the corresponding diff on the wiki. Beneath this is the basic information on who made the edit, the timestamp, and the edit summary, followed by the diff itself.

You can hide/show each result using the [hide]/[show] links in the heading next to the timestamp.