TensorFlowOnSpark brings TensorFlow programs to Apache Spark clusters
pysolr is a lightweight Python client for Apache Solr. It provides an interface that queries the server and returns results based on the query.
TensorFrames (TensorFlow on Spark DataFrames) lets you manipulate Apache Spark's DataFrames with TensorFlow programs.
Python client for the Apache Kafka distributed stream processing system. kafka-python is designed to function much like the official java client, with a sprinkling of pythonic interfaces (e.g., consumer iterators).
A modern, feature-rich and highly-tunable Python client library for Apache Cassandra (2.1+) and DataStax Enterprise (4.7+) using exclusively Cassandra’s binary protocol and Cassandra Query Language v3.