We have a minimal functional product, which means that OpenPetra is not finished, and probably never will be, but it is usuable today. The idea is to release early and often, to get feedback from you, the real users!
You can either play with OpenPetra at https://demo.openpetra.org with no real data, or you can sign up for a free account (which has no time limit) for testing OpenPetra at https://www.openpetra.com.
You can also install OpenPetra locally or on your own server or VM, have a look at this script: https://get.openpetra.org
Please only run this script on a clean server or VM that does not run any other application. In general we recommend for running your own server, that you have a professional background in IT, so that you can ensure that data protection and data security are maintained.
The manuals can be found here.
Below are the links to the most recent OpenPetra releases with some notes about each release.