Believe it or not I actually try to avoid plugins because they make it difficult for me to standardize my development machines, but typically some need arises and a plugin is installed…

These are most of the main tools and plugins I use for development.

Programs

• iTerm2 - Terminal with nice split screen support and better fullscreen options
• SublimeText - Cross platform text editor
• SourceTree - Visual Git client
• nvAlt - Quick note taking and searching
• MouApp - Markdown Editor
• join.me - Screen sharing
• GrandPerspective - Not quite as nice as WindirStat but pretty close and the price is right.
• Charles - Proxy app much like Fiddler but for Mac

OSX Plugins

• Spectacle - Window manager that works great and is free.
• Moom - Another really good Window manager for OSX that lets you do things like save and window positions to hot keys. (60/40 splits or whatever you want)
• Oh-my-zsh - Auto completion and plugins for terminal.
• Network Link Conditioner (Search Hardware IO Tools for Xcode) Test different network conditions by throttling bandwidth.

SublimeText 2 Plugins

• Package Control - The simplest way to install sublime plugins
• Tag - Great plugin for indenting and pretty printing compressed XML
• Pretty JSON - Make JSON look pretty too
• Indent XML - I used to use this one a lot, but recently started using Tag more.
• Git - Sometimes its nice to be able to run quick git commands in Sublime
• BracketHighlighter - Provides nice bracket highlighting
• Colorpick - For quick in app color picking
• SublimeCodeIntel - Code intelligence
• sublime-jinja2 - Jinja2 template support

Xcode Plugins

• XVim - Vim bindings for Xcode.
• Mini Xcode - Minimize the main toolbar but keep access to the scheme selector

Chrome Plugins

• Vimium - Vim bindings for Chrome
• JSONView - Pretty print for JSON
• XV - XML Viewer - Pretty print for XML
• Resolution test - Quick way to snap the browser to common resolutions
• CSS Reloader - Reload the stylesheet without reloading the whole page.