Free Software Free Software means that there are no restrictions on the use of free software and the same rules apply to copying or distributing software , and the distribution copy may be the original or modified version of the software. These are called free software. Free / open source software is any software that is released under a free license that gives users the freedom to use it , research it , modify the source code , modify and develop any type of software. General and commercial users can easily realize its usefulness. At the same time, its popularity continues to grow. Free software is usually available for free , but the field may have to pay a special price. For example, if the software is distributed on CD, the software may have to be accepted for the cost of making the CD.