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Just curious, do you have a good idea of how many of these are still being actively developed? I remember seeing stuff like Ringpop and Hyperbahn get moved to the uber-archive github account.

I'm especially curious about Schemaless, since it seemed like at one point every company tried to build a NoSQL KV store on top of sharded MySQL, realized how janky it is, and are currently decommissioning it.

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Cadence (cadenceworkflow.io) is a project originated in Uber that is worth mentioning. It's a workflow engine but with very unique capabilities. It has a lot of potential. I've heard of many companies using it, e.g. HashiCorp, Airbnb or Banzai Cloud.

The development team is pretty active. They've been doing an important effort to gain community adoption, e.g. persistency with MySQL, Postgre in the works, Prometheus style metrics, a proposal process or design docs. Very interesting.

uDeploy and m3 are still widely used internally. Hyperbahn is dead AFAIK. Not sure about the rest.

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