Today we released the first Flowable Eclipse Designer version (5.22.0). This is a fork of the Activiti Eclipse Designer with support for Eclipse Mars and Neon versions, and with a number of smaller fixes and features.
The code can be found on Github https://github.com/flowable/flowable-designer.
The update site can be found of http://flowable.org/designer/update. The zip file of the update site can also be downloaded from http://www.flowable.org/designer/archived/flowable-designer-5.22.0.zip
Please let us know if you encounter bugs or if you are looking for specific features on the forum http://forum.flowable.org, and by creating issues on the Github issues page https://github.com/flowable/flowable-designer/issues. The developers of the Flowable project are keen to help you answering your questions and helping out with possible issues.