Discuss.green / Antragsgrün is open source software and can be installed on any web server that supports PHP and MySQL.
For european green parties, we provide free hosting of sites on this domain. You can start using or evaluating this tool by answering a couple of questions about your use case and providing a valid e-mail-address. Creating your own instance only takes two minutes.
About internationalization: We provide an english and german version, as well as a nearly-completele french version. If you are interested in helping translate this tool in other languages, please contact us.