There's a Cyberpunk Neon theme for your 3DS homescreen! For this to work, you will need CFW and CHMM2. You can install it from Theme Plaza or copying the zip archive in the 3ds folder to your themes folder.
Cyberpunk Neon Fedilab theme is featured on https://fedilab.app/themes/. You can also find it in this repository in fedilab/fedilab_cyberpunk-neon.csv
The official theme of Cyberpunk Neon is available in Firefox Addons. Please use the "v2" version, as the previous one is not made by me and has some contrast issues.
Open the game. Go to Configuration -> Interface -> Theme Editor and click "Import/Export". Now copy the content of tabletop-simulator/tabletop-simulator_cyberpunk-neon.txt
You can install the updated Telegram theme using this link: https://t.me/addtheme/cyberpunk_neon_v2
The file telegram/cyberpunk-neon.tdesktop-theme file in this repository can also be used. Just drop it to a chat.
The Android theme can be installed using this link: https://t.me/addtheme/cyberpunk_neon (Warning: Not maintained by me). Note that the Android theme is not up-to-date with the current Desktop theme.
The file telegram/cyberpunk-neon.attheme file in this repository can also be used. But it contains the first version released.
If you use Zim you can copy zim/style.conf into ~./config/zim
cp -r zim ~/.config