Essentials Needed for Setting up OS X As a development environment

Terminal tools

iterm2 Terminal
Homebrew Package manager

Productivity

Alfred Search and launcher (Paid add ons)
SizeUp Window managment (free trial)
Spectacle Window managment (free)
Hyperdock Dock extras
iStatMenus System stats in the menubar
Glimmerblocker System wide ad blocking

Mouse / Keyboard

Better touch tool
Synergy
Karabiner Keyboard remapping
Smoothmouse Scroll and mouse lag fixes

Chat

Colloquy IRC
Textual IRC (paid)
Adium Chat

Development Tools

SequelPro Datbases
Chicken of the VNC VNC Client
Virtualbox Virtualization
Vagrant
Redis Desktop Manager Redis GUI
Sublime Text Text editor (free trial, paid)

VPN

Viscosity Paid openvpn client
Tunnelblick Free openvpn client

Tools

Unarchiver Handle all archive formats
Cyberduck FTP
Transmit (S)FTP/S3 (free trial, paid)

Password managers

Other fixes

iTerm2 Url Handler setup instructions

ssh
man