en:Download (3.4.12)

Here you can download Weka

platform-independent ZIP (http://prdownloads.sourceforge.net/weka/weka-3-4-12.zip?download)
Windows Installer (http://prdownloads.sourceforge.net/weka/weka-3-4-12.exe?download)
Windows Installer (with JRE) (http://prdownloads.sourceforge.net/weka/weka-3-4-12jre.exe?download)
Mac OS X application (http://prdownloads.sourceforge.net/weka/weka-3-4-12.dmg?download)