Reaqtor is the evolution of Reactive Extensions (Rx).

The process of open sourcing Reaqtor took endjin, Microsoft and the .NET Foundation over 4 years to complete and involved 1000s of hours of meetings, proof of concepts, whitepapers, business cases, patent reviews and legal sign off, which cost many tens of thousands of dollars.

Now that the source code belongs to the community, it's vital for the community to support the project to ensure it has a long term, sustainable future. Reaqtor is an order of magnitude bigger than Reactive Extensions with over 166 projects, and 90 NuGet packages.