Does open source come with any licensing at all?
The open source community recognises a range of individual off-the-shelf open source licenses. In order to qualify, a license must satisfy the open source definition, and offer users the right to freely obtain, use, reuse and distribute licensed code. Some go further, adding what’s known as a copyleft clause that stipulates that any subsequent, derivative code must be released under the same open license. Nothing in the open source definition compels distributors to release software for no fee, but anyone who acquires the software may redistribute as widely as they wish without remuneration.