Yeah you can download the full product, it works for a trial period and then transitions to a less full-featured free mode, which does not nag you at all.

Sublime is certainly the closest, but there’s little bits of TextMate’s UI design that give it a certain mac-ness, if that makes sense. It’s a touch less utilitarian in a good way.

Some amount of that could probably be achieved with a Sublime Text theme designed for that like Soda[0] used to be back in the day, but I know of no modern equivalent (if anybody knows of one please mention it!).

[0]: https://buymeasoda.github.io/soda-theme/