I install these on OS X every single time I set up a new one:
- Homebrew – package manager http://brew.sh/
- QuickRes – resolution manager http://quickresapp.com/
- ClipMenu - clipboard manager http://www.clipmenu.com/
- QuickCast – quick screencasts http://quickcast.io
- Honeycomb – desktop client for Foursquare https://itunes.apple.com/us/app/honeycomb/id905814675?mt=12
- SmoothMouse – Windows-like better mouse acceleration http://smoothmouse.com/
- 1Password – password vault https://agilebits.com/onepassword
- Microsoft Remote Desktop – https://itunes.apple.com/us/app/microsoft-remote-desktop/id715768417?mt=12
- iTerm 2 – better terminal app http://iterm2.com
- oh-my-zsh – replaces bash smoothly https://github.com/robbyrussell/oh-my-zsh
- Twitter - https://itunes.apple.com/us/app/twitter/id409789998?mt=12
- NetNewsWire – RSS Reader http://www.netnewswireapp.com/