I'm surprised nobody mentioned Gemfire and Greenplum (one of their acquisitions) - both rather important data platforms. I also had to do work with Pivotal HD,

I'm surprised nobody mentioned Gemfire and Greenplum (one of their acquisitions) - both rather important data platforms. I also had to do work with Pivotal HD, which was their custom Hadoop distribution. Not sure the status of that these days, they may have nixed it - it's been a while since I worked on that platform.