Download of Apache Flume 1.8.0 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program lies within Developer Tools, more precisely IDE. We recommend checking the downloaded files with any free antivirus. This free software for Mac OS X is an intellectual property of Apache Software Foundation.
From the developer:
Flume is a distributed, reliable, and available service for efficiently collecting, aggregating, and moving large amounts of log data. It has a simple and flexible architecture based on streaming data flows. It is robust and fault tolerant with tunable reliability mechanisms and many failovers and recovery mechanisms. It uses a simple extensible data model that allows for the online analytic application.
You may want to check out more software for Mac, such as Apache Flex SDK Installer, Apache Marmotta or Apache OpenOffice, which might be similar to Apache Flume.