• Pop!_Planet is still very much under development. Data for the wiki is being sourced from the Arch Linux and Ubuntu wikis, along with a bunch of completely unique content specific to Pop!_OS, and sourcing, converting and updating that content takes time; please be patient. If you can't find what you're looking for here, check the Arch Linux and Ubuntu wikis.
Pop Mattermost Theme - Dark

Pop Mattermost Theme - Dark 1.0.0

haven't used it long enough to know if it's excellent, but first glance looks good.