What Does Open-Source Tools Mean?

Open-source tools are software tools that are freely available without a commercial license. Many different kinds of open-source tools allow developers and others to do certain things in programming, maintaining technologies or other types of technology tasks.

Techopedia Explains Open-Source Tools

Open-source tools stand in contrast to tools that are commercially licensed and available to users for a fee. Well-known examples of open-source tools include many of the software products from the Apache Foundation, such as big-data tool Hadoop and related tools. Most of these are freely available, with the licensing held by a user community, instead of a company making a profit from software.