Does anyone knows some free cool Mac apps?

What are some of the free cool mac apps are you using? I am using for instance the below 4 ones and I find them very nice:

https://itsalin.com/appInfo/?id=pearcleaner

https://shottr.cc/

https://lihaoyun6.github.io/quickrecorder/

https://icemenubar.app/

Does anyone uses some other cool free apps, it can be from any category . I am also paying for apps like screen studio, better display, xnapper, magnet and a few others. But I was wandering if there are some that are cool and free also.