Free Software vs Open Source

These get used interchangeably, but they're not quite the same thing.
Free software (as in freedom)→ Focuses on user rights — freedom to run, study, modify, and redistribute the software→ Champion: Free Software Foundation, GNU project→ A tool can be "free" even if it's inconvenient to use, as long as those freedoms exist
Open-source software→ Focuses on the development model — source code is publicly available and can be modified→ Emphasis is more practical: collaboration, transparency, faster iteration→ Not always free of cost — some "open-source" tools have paid tiers or commercial licenses
The overlap: most software that's one is also the other. The split mainly comes down to philosophy — "free" is a rights-based argument, "open-source" is a development-practicality argument.
If you're evaluating projects by license type, TechLogHub's open-source section shows the actual license (MIT, GPL, Apache 2.0, etc.) for each project, which matters more in practice than the free vs open-source label.
→ techloghub.com/open-source