[profsummergig]

I've used Obsidian and Tangent. For whatever reason, I've found Tangent's code highlighting brighter, more colorful, and (maybe hence?) more easily readable. Obsidian is more muted. Steve Jobs would have preferred Obsidian.

[aldonius]

Surely that's plugin-modifiable in Obsidian.

[whatevertrevor]

Doesn't even need a plugin, just some custom CSS iirc.