Aurora is from Twitter, but Mesos is not. They hired some of the team that developed Mesos while in academia, but still. Mesos is external of Twitter.

Disclaimer: I use both Mesos and Aurora.

I started looking at finagle, finatra and scrooge. i love all three projects. but at the same time, the documentation is really really bad.

if you have the same requirement as twitter, nice -- but if you detour even a little bit, you are going to have a shitty time (for example, for thrift, i wanted to use buffered codec instead of framed and there was not a single document explaining how to do it. i spent ~2h perusing unit tests to find a way which i don't know if it's correct or not).

Also forgot to mention scalding.

Don't forget Netty..