Parachute Backup copies data from iCloud and Apple Photos into a folder or cloud destination of your choosing, supports scheduled runs, and offers several backup types.
The USB Connection Information app displays data about connected USB devices directly in the macOS Menu Bar. It costs $4.99 and does not offer a trial period.
Mousio is an app that allows you to control the mouse using your keyboard. It’s activated by double-pressing the Command key and supports flexible customization.
Zen Browser is a rebranded version of Firefox running on the Gecko engine. It features an unusual interface and something called Spaces profiles, but as of now, it offers very few unique features.