Mine is abit of a cheat since its for iOS/Mac/iPad but MoneyStats. It does balance forecasting and unlike Kualto/Dollarbird/other balance forecasting apps, you can actually buy it. No subscriptions please.
Rectangle - It presets window sizes and assigns them to keystrokes. It’s great to quickly be able to move 2 apps to half a screen each, move them between monitors etc.
Shortcat - allows you to basically do anything that you would with the mouse by the keyboard. It’s hard to explain so look it up! It also has a brilliant emoji picker that works so much quicker than the native one.