Top 20 NuGet backpressure Packages

Extension methods: Flux and Mono, Schedulers and other tools.
Rx Lite Backpressure (rx-lite-backpressure) binding library for Bridge.NET projects.
Reactive Extensions Advanced Flow Library contains the Reactive-Streams enabled extension methods to build non-blocking backpressured flows, plus support for Single (1 element or 1 error) and Completable (1 complete or 1 error) reactive types.
A utility to limit the rate of calls to any provided function.