Redmine

We are starting to use Redmine in our organization and I would like to add a 'Milestones' or 'Roadmap' plugin to help us plan and meet goals. I found some plugins ([1], [2], others) but none seem to run on Redmine 2.x.

[1] http://www.redmine.org/plugins/redmine_milestones
[2] http://www.redmine.org/plugins/advanced_roadmap

Can anyone suggest a currently-maintained plugin for planning releases? We are looking to mark specific issues to a milestone, which may or may not become a release version. Note that milestones may be pushed back, so assigning individual dates to each issue is not practical.

Thank you.