Critical Mass has been described as 'monthly political-protest rides', and characterized as being part of a social movement.

http://en.wikipedia.org/wiki/Critical_Mass_(cycling)

This app tracks your location and shares it via a map with all other participants of the Critical Mass bicycle protest. You can use the chat to communicate with all other participants.

Yep! Here: https://github.com/CriticalMaps/criticalmaps-ios

• If you can code: Just go ahead and send us a pull request. If you're planning a bigger feature, it might be a good idea to open an issue before starting in case someone is working on something similar.
• If you find bugs: File them in the github issue tracking system.
• If you find translation errors or want to add a new language: Head over to our Transifex site and join a translation team.
• If you have moneyz left to burn: Help us finance the server.

Check: http://criticalmaps.net

This project exists thanks to all the people who contribute. [Contribute].

Become a financial contributor and help us sustain our community. [Contribute]

Support this project with your organization. Your logo will show up here with a link to your website. [Contribute]