The latest version of OpenProject will be released shortly. Currently, the last features are rounded off and the last critical bugs are being fixed.
OpenProject 4.0 includes major improvements compared to the prior version OpenProject 3.0 with OmniAuth integration, many additional features for the work packages page such as an integrated toolbar, a details pane to display work package information right from the work package list and additional improvements with regard to accessibility and design.
OpenProject 4.0 is scheduled to be released on October 24th: Release #3708 scheduled: Release OpenProject 4.0 2014-10-24 – 2014-10-24. For an overview of the planned releases, please refer to the release timeline.
To get an overview of the new functionality, have a look at the Release Notes.