The Java SE Runtime Environment (JRE) allows end-users to run Java applications.

The Java SE Runtime Environment contains the Java virtual machine,runtime class libraries, and Java application launcher that are necessary to run programs written in the Java programming language.
It is not a development environment and does not contain development tools such as compilers or debuggers

What's New:
· ability to increase the heap size and specify command-line arguments on a per-applet basis
· ability to select a particular version of the Java Runtime Environment for an individual applet
· improved reliability
· better and more portable integration between the Java and JavaScript programming languages
· improved support for accessing the DOM of the containing web page
· enhanced support for web services

Download: Java SE Runtime Environment (JRE) 8 Build b39 Preview 32-bit (20.1 MB) | 64-bit (20.9 MB) | Java SE Runtime Environment (JRE) 7.0 Update 3 32-bit (20.1 MB) | 64-bit (20.9 MB) | Java SE Runtime Environment (JRE) 6 Update 32 32-bit (16.3 MB) | Mirror 1 | Mirror 2 | 64-bit (16.5 MB) | Mirror | Homepage