Audited (formerly acts_as_audited) is an ORM extension that logs all changes to your Rails models.
https://github.com/collectiveidea/audited
569 forks.
2.846 stars.
161 open issues.
Recent commits:

• Bump version, Daniel Morrison
• Merge pull request #560 from collectiveidea/coverage-fixFix coverage issue, GitHub
• Punt on coverage error, Daniel Morrison
• Merge pull request #549 from guilpejon/patch-1Fixed small typo in README, GitHub
• Merge pull request #550 from guilpejon/patch-2Improved custom audit user section in README, GitHub