11. LinkedIn - Kafka
Kafka was created by business networking site LinkedIn for internal use, before being open sourced in 2011.
The team of engineers that created the real-time, distributed messaging system left the company last year, to set up a new business focusing on Kafka, called Confluent.
12. Airbnb - Air Flow
Last year, the home-rental firm unveiled plans to open source two data mining tools at its OpenAir engineering summit, AirFlow and Aerosolve.
Airflow is a data workflow management framework that is available under the Apache licence, supporting authoring, scheduling and monitoring of data pipelines.
It has also opened up its Aerosolve machine learning tool which is used internally to support features such as its price recommendations engine for those renting properties.
Source: Computerworld UK
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