This bears repeating... until we get it right!

Author : Richard M. Stallman

Free as in Freedom
The term “free software” is sometimes misunderstood—it has nothing to do with
price. It is about freedom. Here, therefore, is the definition of free software: a
program is free software, for you, a particular user, if:
• You have the freedom to run the program, for any purpose.
• You have the freedom to modify the program to suit your needs. (To make this
freedom effective in practice, you must have access to the source code, since
making changes in a program without having the source code is exceedingly
difficult.)
• You have the freedom to redistribute copies, either gratis or for a fee.
• You have the freedom to distribute modified versions of the program, so that
the community can benefit from your improvements.