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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
The Mint-X theme is always worth a mention. It looks great and is still shipped with Linux Mint releases. It has a gray sort of metal look. This is what I use. https://github.com/linuxmint/mint-themes The Mint-X icons are still available too but they're just from Faenza.
For KDE, I'd always recommend the Oxygen theme. I'm not very familiar with KDE but I know the theme is at least in the Arch package repository and I think this is the right gitlab link: https://invent.kde.org/plasma/oxygen.
If you like Macs, the dock program Cairo-Dock has a bunch of built in themes, including one to look like the OSX style dock with the cool reflections: https://glx-dock.org