From the Big Data and NoSQL space: Hadoop and Cassandra. And related to this space: OpenStack and Puppet.
So to judge importance, I looked at projects that are influential, gaining in popularity, and/or technical standouts in new areas. In other words, projects that are even more noteworthy than the other noteworthy projects. This means that many projects that are crucial didn’t make the list.
On my list of projects left out: Redis, Riak, HBase, and MongoDB. By looking at the explanation of why Android didn’t make the list, I could understand why not including Redis, Riak, and MongoDB. But I’d keep HBase.
Original title and link: Hadoop and Cassandra in the Top 10 Most Important Open Source Projects of 2011 ( ©myNoSQL)