There's far more listed there including entire projects, repos, videos and several blog posts detailing their contributions, including one describing what they'

There's far more listed there including entire projects, repos, videos and several blog posts detailing their contributions, including one describing what they're doing for Cassandra: https://aws.amazon.com/blogs/opensource/contributing-cassandra-community/ https://aws.amazon.com/blogs/opensource/contributing-cassand... Amazon, Microsoft, Google, Oracle, IBM and others are all major contributors to open-source software.