Prerequisites
I've included the short snippets to install most of these using Homebrew. The installation instructions for Homebrew and Homebrew Cask are also included. If you would prefer not to use either, you can click on the titles for their project pages.
1Password gives you the security you need in today's online world without slowing you down. 1Password makes you more productive while simultaneously increasing your security with strong, unique passwords for all your accounts.
brew cask install onepassword
Pricing: $35 (single license)
Alternatives: LastPass, mSecure
Dash is an API Documentation Browser and Code Snippet Manager. Dash stores snippets of code and instantly searches offline documentation sets for 130+ APIs (for a full list, see below). You can even generate your own docsets or request docsets to be included.
brew cask install dash
Pricing: Free test drive mode, $20 (single license)
f.lux makes your computer screen look like the room you're in, all the time. When the sun sets, it makes your computer look like your indoor lights. In the morning, it makes things look like sunlight again.
brew cask install f-lux
Pricing: Free (proprietary)
Alternatives: Nocturne
The missing package manager for OS X.
ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"
brew doctor
Pricing: Free (open source)
Alternatives: MacPorts
A friendly homebrew-style CLI workflow for the administration of Mac applications distributed as binaries.
brew tap phinze/homebrew-cask
brew install brew-cask
Pricing: Free (open source)
ImageOptim optimizes images — so they take up less disk space and load faster — by finding best compression parameters and by removing unnecessary comments and color profiles. It handles PNG, JPEG and GIF animations.
brew cask install imageoptim
Pricing: Free (open source)
Alternatives: ImageMagick
iStat Menus is an advanced Mac system monitor, covering an enormous range of stats. It lives right in your Mac’s menubar, so detailed information is only ever a glance or single click away.
brew cask install istat-menus
Pricing: Free Trial (14 days), $16 (single license)
Alternatives: atMonitor, MenuMeters
iTerm2 is a replacement for Terminal and the successor to iTerm. It works on Macs with OS 10.5 (Leopard) or newer. Its focus is on performance, internationalization, and supporting innovative features that make your life better.
brew cask install iterm2
Pricing: Free (open source)
Alternatives: TotalTerminal, MacTerm
.files, including ~/.osx — sensible hacker defaults for OS X
Pricing: Free (open source)
Alternatives: Zach Holman's dotfiles, Yan Pritzker's dotfiles
A community-driven framework for managing your zsh configuration. Includes 120+ optional plugins (rails, git, OSX, hub, capistrano, brew, ant, macports, etc), over 120 themes to spice up your morning, and an auto-update tool so that makes it easy to keep up with the latest updates from the community.
curl -L https://raw.github.com/robbyrussell/oh-my-zsh/master/tools/install.sh | sh
Pricing: Free (open source)
List of useful Quick Look plugins for developers.
brew cask install qlcolorcode qlstephen qlmarkdown quicklook-json qlprettypatch quicklook-csv betterzipql webpquicklook suspicious-package && qlmanage -r
Pricing: Free (open source)
Move and resize windows with ease. Window control with simple, customizable keyboard shortcuts.
brew cask install spectacle
Pricing: Free (open source)
Alternatives: SizeUp, Divvy, Cinch, Slate
A sophisticated text editor for code, markup and prose. You'll love the slick user interface, extraordinary features and amazing performance.
brew cask install sublime-text
Pricing: Free Trial (unlimited w/ prompts), $70 (single license)
Alternatives: Brackets, TextMate, Coda, TextWrangler, Espresso
The Unarchiver is a small and easy to use program that can unarchive many different kinds of archive files. It will open common formats such as Zip, RAR, 7-zip, Tar, Gzip and Bzip2. It will also open many older formats, such as StuffIt, DiskDoubler, LZH, ARJ and ARC. It will even open other kinds of files, like ISO and BIN disc images, some Windows .EXE installers. The list is actually much longer - see the program homepage for the full list.
brew cask install the-unarchiver
Pricing: Free (open source)