It's open source but they use SVN so you need an SVN client to actually see the code because they have no browsable repo tool.
You can find some mirrors of the code on GitHub, for example: https://github.com/mirror/jdownloader
It's open source but they use SVN so you need an SVN client to actually see the code because they have no browsable repo tool.
You can find some mirrors of the code on GitHub, for example: https://github.com/mirror/jdownloader