Here are the lists of applications that I prefer.

Common

• git commit log visualization: tig

Manjaro

• screenshot(screen capture): flameshot, gnome-screenshot
• tiling window manager: i3wm
• pdf-viewer:
  • zathura with mupdf plugin (vim-like shortcuts)
  • evince (zathura is convenient but insufficient sometimes.)
• academic paper management: mendeley (easy to share, multi-platform)
• launcher: Rofi

The list will be updated continually.