My custom raid icons for replacement of the original ones as seen in oUF_Hank, Tukui, ElvUi and on CNN.
For addon developers
Photoshop document + ready to use WoW texture (64x64px, 4 columns, 2 rows).
Feel free to use them in your projects. Giving credits would be nice though.
For end users
You can replace the normal ingame icons with this icon pack by following these simple steps:
Create this subfolder:
...\World of Warcraft\Interface\TARGETINGFRAME\
Extract UI-RaidTargetingIcons.blp to this folder
This will overwrite the standard icons in UI elements like unit frames or raid icon context menus. To replace the actual icons above players in the 3d environment it would be necessary to pack this into a mpq file but since this is a bit frowned upon here I'm not gonna dig into that further.