Can you give me one open-source license that is not "free software"?

According to .... the FSF? They disapprove of a lot of licenses that meet OSI's definition of open source.

There's quite a number in this list that meet OSI's definition (or are even explicitly approved by OSI), but are explicitly labelled non-free by FSF:

https://www.gnu.org/licenses/license-list.html#NonFreeSoftwa...

Two clear examples are:

Apple Public Source License 1.x

NASA Open Source Agreement