From Agile Retrospective Resource Wiki
-  Agile Retrospectives: Making good Teams Great] by Derby and Larson
- Project Retrospectives: a Handbook for team reviews by Norman L Kerth
- The Retrospective Handbook by Patrick Kua
- Innovation Games by Luke Hohmann (and his book of the same name)
- Getting Value out of Agile Retrospectives by Luis Gonçalves and Ben Linders: download from InfoQ or LeanPub, Paperback Edition
- Retromat Print Edition Fun printed version of the online "Retr-O-Mat"
- Refactoring Your Development Process with Retrospectives (Rachel Davies)
- News, articles and presentations on retrospectives from InfoQ
- Seven Steps to Remarkable Retrospectives
- Agile Retrospectives: Why You Would Do Them?
- Agile Retrospectives - More than just facts
- Sustainable Continuous Improvement Using Agile Retrospectives
- Making Agile Retrospective Productive
Blogs / Websites
- "Retr-O-Mat" - Planning your next retrospective? Get started with a random plan, tweak it, print it and share the URL. Or just browse around for new ideas! » plans-for-retrospectives.com
- Retrospective Exercises Toolbox - Use this toolbox with retrospective exercises to design your own valuable agile retrospectives!
- Blog for Agile Retrospectives by Luis Goncalves
- Blog für Retrospektivenliebhaber by Marc Löffler (in German) and the book (to be published) "Retrospectiven in der Praxis"
- Getting business value out of Agile Retrospectives
- Introspection And Retrospectives and Restrospective Techniques
- The Art of the Agile Retrospective by J.D. Meier
- Scrum Patterns for Process Improvement
- Some Patterns for Iteration Retrospectives
- Agile Retrospective Anti Patterns
- Do's and Don'ts of Agile Retrospectives
- Retrospectives in Remote Teams
Video and Presentations
- Video: Retrospectives Presentation at San Francisco Agile User Group
- Video: Agile Retrospectives - Making Good Teams Great!
- Sustainable Improvement through Retrospectives
- A guide for Preparing and Facilitating Retrospectives
- Free 12 Week Agile Retrospectives Program by Luis Goncalves