A few things I like and use often.

Fonts

Museo Slab, Source Code Pro

General Mac applications

Adium, Sublime Text, GrandTotal, Many Trick’s Moom, iTerm2, AlfredApp, LatexIt, Go2Shell, Navicat, Spotify, Skitch, MAMP Pro, GrandPerspective, AppCleaner

Development applications

git (duh), rvm, scm_breeze, ImageOptim, PNGMini, PNGQuant, dnsmasq, grc (generic colouriser), Objektiv

  • coreutils (brew install coreutils) - These OS X default tools are so old!

Miscellaneous stuff

Argonaut (my favorite iTerm2 theme), Jrnl