Licensing of Code::Blocks

Code::Blocks and Code::Blocks EDU-Portable are distributed under the GPL v3.0 license which means they can be used freely by anyone!

The only exception is the SDK which is allowed to be linked by closed-source plugins.
All pre-installed libraries are Open Source.

Full license text of the GPL version 3.0:
  http://www.codeblocks.org/license/3