Reetro.io - Reetro is a versatile retrospective tool for agile teams, collaborate with your team and get better in what you do with a simple, intuitive and beautiful tool

Metro Retro - For productive, engaging and fun retrospectives

Retrium - Sprint retrospectives made easy and effective for distributed scrum teams.

Neatro - Neatro is the online Agile retrospective platform designed to help teams improve continuously.

Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.

Outro - A new take on retrospectives for progressive teams