Richard Stallman is a computer programmer and free software activist. Richard believed that computer users should have the freedom to use, share, study and improve the software they used. He created the idea of free software, which means that anyone can download programs for free, share them with others and change them or modify them to better suit their own needs. Richard's work led to the creation of the GNU General Public License (GPL), which is a legal license used to protect the rights of developers and others who create and share free software. Richard is also seen as an important leader in the open-source movement, which encourages cooperation between developers and encourages the sharing of code so anyone can use, improve and distribute the software without restrictions.