DeskRest reminds you to take breaks, tracks focus time, idle time, and calls, and offers exercises and notifications. There’s a trial period; after that, pricing starts at $9.99/year.
The MIDI Volume Control utility lets you adjust system volume and Apple Music volume independently, and it configures itself automatically. The price is $1.99.
SyncthingStatus adds quick access to Syncthing sync status, notifications, and network monitoring directly in the menu bar, making it easier to fully replace Dropbox.
WakeMinder gives you reminders at startup or at the right moment: you set the time on your iPhone/Watch, and your Mac shows the notification. There’s also a paid version for $1.99.
Ghost Input is a macOS utility that records and replays user actions. It’s simple to use, includes a macro editor, costs $6.99, and does not offer a trial period.
Control D is a service that allows you to create your own DNS with website blocking rules, configure filters, and connect devices for parental control.
ByeCtrlClick allows you to enable and disable the Control + click combination — which turns a left mouse click into a right click — directly from the macOS menu bar.