Wikipedia:SWViewer

SWViewer (direct link) is a user-friendly webapp that is used to detect and revert vandalism, spam, and other types of unconstructive edits made at various Wikimedia projects. With a simple and intuitive UI, you can monitor changes in real-time. In doing so, it provides a lot of features, such as the ability to rollback edits, tag pages with speedy deletion, and edit source on the page. To use the application, the rollback permission is required.