For my job I require the use of the spreedX client which allows me to share my desktop when using the Spreed web conferencing environment (www.spreed.com). In pre-Unity Ubuntu versions, this application's indicator worked perfectly. However, it doesn't play nice with Unity (it doesn't show), not even when adding the magic
gsettings set com.canonical.Unity.Panel systray-whitelist "['all']".
So I'm not entirely sure where to go from here, but I did find the (presumable) source of the client: https://github.com/andreashe/mygitsite/tree/master/spreedX.
I'm assuming that for an (experienced?) Python developer, it shouldn't be hard to fix the app by using the guidelines which I found here. Unfortunately, I'm no Python developer, let alone an experienced one :-(
But perhaps there are other solutions which I did not think about? Of course, I will contact Spreed and ask them to fix this, but if they won't (or it takes them forever) I would love to have some more options...