Itsycal is a tiny menu bar calendar. If you want, it will display your events as a companion to the Mac Calendar app. You can also create and delete (but not edit) events.
Lofree Digit Calculator is the first retro inspired mechanical calculator. Its mechanical switches offer a tactile and responsive typing experience to help let increase your efficiency and productivity.
Take a screenshot of math and paste the LaTeX into your editor, all with a single keyboard shortcut.