Many of these have good FOSS alternatives. Bettertouchtool does a million things, but check out rectangle, middleclick for some of the features. TempMonitor has several alternatives but if you’re mostly after menu bar widgets, there’s one called “stats”. Al dente is free, though Apple has something like this built in already but it’s heuristic based and less predictable. After building an 80% charge limiter into iOS and iPadOS I bet this will show up in a future macOS version. Lulu is an alternative to little snitch.