OmniMac

OmniMac puts several small Mac utilities in one menu bar process: a notch island, per-app volume with a 10-band equaliser, window tools, an app cleaner that removes leftovers, a helper for disk-image downloads and others. Each module can be switched off, and a switched-off module leaves the menu. It suits people who want these tools without installing a separate app for each. The README reports about 16 MB of memory and very low idle CPU use, measured by the author.

It needs macOS 14.2 or later and is a universal binary, although the README says it has only been tested on Apple silicon. The README says it is not notarized, so on first launch you must allow it under System Settings, Privacy & Security, with Open Anyway. The only network traffic it makes is a daily update check against GitHub, which you can turn off. Clipboard history stays in memory unless you turn on saving to disk, which is unencrypted.