Can I modify and distribute free software for commercial purposes?

Yes, you can modify and distribute free software for commercial purposes, but there are important considerations to keep in mind. The term "free software" primarily refers to the freedom it offers users, rather than to the price. Free software is typically released under licenses that grant users the freedom to run, study, modify, and distribute the software. However, the specific terms depend on the license under which the software is released. Some free software licenses, such as the GNU General Public License (GPL), allow you to modify and distribute the software, but require that any derivative works also remain free under the same license terms. This means that if you distribute modified versions, you must also provide the source code and retain the same rights for the recipients. Other licenses may be more permissive and allow distribution without those obligations. It is essential to read and understand the terms of the specific license that applies to the software you intend to modify or distribute. If you are planning to use free software as part of a commercial product, it is wise to consult a legal expert who specializes in software licensing to ensure compliance with the terms of the license. You can find detailed information about various licenses and their implications on the Free Software Foundation's website.