Free speech, free beer and free software

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“Confusion arises because free software mostly has a zero price tag
as a natural consequence of the original license, the GPL, that
enforces the liberty of developers to use code created by their
peers. The innovation of the Open Source Initiative was to provide
new, more business-friendly licenses. By suggesting alternatives to
GPL licensing, it enabled hybrid open-source/closed-source works.” More at News.com.