ImageMagick

A command line tool for processing image file e.g. $ convert image.svg image.png

HyperDock

Enable window preview in dock like what Windows do.

IINA

A video player for Mac.Find it in this.

AirDroid

Transfer files between Android devices an Mac.

Annotate

Selecta and copy screen area to clipboard and add annotation to it.

CheatSheet

Hold command key to see the shotcuts of this app.

Bartender2

Origanize the menu items in menu bar.

Dr. Cleaner

It's obvious.

Sip

Pick color from screen.

FileZilla

Sftp transfer.

ForkLift

Replacement of FileZilla

iTerm2

Replacement for Terminal.

A technique to move cursor between words:

Synergy

Share mouse and keyboard between different computers, like PC and Mac.

Alfred

Replacement for Spotlight.