Leit Audio Places is a free algorithmic reverb built around twelve voiced spaces rather than a wall of parameters. Six are familiar rooms, halls and plates, and six are imagined worlds such as shimmer, long echoes, dark expanses and rising tones. You steer them with three controls: a Reverb knob shaped per algorithm, a Mix blend, and Pre-Delay up to 500 ms.
It installs from a roughly 6 MB download as a VST3 and AU plugin on macOS, Windows and Linux, with the Linux build making it one of the few quality free reverbs on that platform. There is no trial, subscription or activation; a free Leit Audio account is all that is needed to download it.
For the full breakdown, see the Places first look.