[ Thanks to An Anonymous Reader for
this link. ]
“The Free Software Foundation is the principal organizer of the
GNU Project, and you can find the FSF’s guidelines on choosing an
open source license in this post. The guidelines cover how to
choose an overall license for a project, and also cover making
decisions on licensing modified versions of an existing
project.“Through the guidelines, you can gain knowledge about what
Copyleft is, and why it’s a favorable licensing strategy. For many
creators, the FSF recommends the Apache License 2.0, with more
details here. There are many other licenses to consider, including
the GNU Lesser General Public License (LGPL), and the GNU Affero
General Public License (AGPL). Notably, many open source projects
don’t license relevant documentation, but the GNU Free
Documentation License is a wise choice for doing so.”