Weka is tried and tested open source machine learning software that can be accessed through a graphical user interface, standard terminal applications, or a Java API.
It is widely used for teaching, research, and industrial applications, contains a plethora of built-in tools for standard machine learning tasks, and additionally gives transparent access to well-known toolboxes such as scikit-learn, R, and Deeplearning4j.
There are two versions of Weka: Weka 3.8 is the latest stable version and Weka 3.9 is the development version. New releases of these two versions are normally made once or twice a year. For the bleeding edge, it is also possible to download nightly snapshots of these two versions.
The stable version receives only bug fixes and feature upgrades that do not break compatibility with its earlier releases, while the development version may receive new features that break compatibility with its earlier releases.
Weka 3.8 and 3.9 feature a package management system that makes it easy for the Weka community to add new functionality to Weka. The package management system requires an internet connection in order to download and install packages.
Snapshots
Every night, a snapshot of the Subversion repository with the Weka source code is taken, compiled, and put together in ZIP files. This happens for both the development branch of the software and the stable branch. Those who want the latest bug fixes before the next official release is made can download these snapshots.
Stable version
Weka 3.8 is the latest stable version of Weka. This branch of Weka only receives bug fixes and upgrades that do not break compatibility with earlier 3.8 releases, although major new features may become available in packages. There are different options for downloading and installing it on your system: