Internet

• Firefox – main web-browser

Code

• Sublime Text – text and code editor
• Homebrew – package installer for OS X
• Oh-My-Zsh – better shell with extensions
• Git – version control system
• GitKraken – diff viewer & Co.

Graphics, Audio and Video

• Gravit Designer – vector graphics
• GIMP – raster graphics
• Krita – painting
• ImageOptim – compressing images
• Shrinkit – compressing PDFs
• VLC – universal video player
• XnViewMP – image viewer

System and Files

• AppCleaner – removing crap of programs being deleted
• CopyQ – clipboard manager
• ForkLift – dual-panel file manager (the closest alternative to TotalCommander) (trial, 30$)
• Rename – mass-renaming of files
• Singular – search for duplicated files (devs gave free reg)
• Stuffit Expander – unarchiver for lots of formats

Look and Feel

• f.lux – auto-ajust color temperature according to the time of day/night
• Karabiner – CapsLock => ForwardDelete and other keyboard shortcuts
• Spectacle – quick shortcuts for window positioning