This release in particular had a greater focus on improved usability and features that make the project easier to use (and adopt). Lots of improvements on the workbench UI, support for social activities and plugin management, as well as a brand new Execution Server for rules are among the new features.
Execution Server Management UI
Here are a few links of interest:
JetBrains and Syncro Soft for the open source licenses to their products that greatly help our developers!