A memo of packages you should definitely install in Sublime Text 3.
Japanize
Japanese localization
Terminal
Opens terminal in current directory. Convenient.
ctrl+shift+T
ConvertToUTF8
Prevents character encoding issues.
IMESupport
For Windows. Prevents the annoying box that appears when typing Japanese kana characters. Hard to explain but recommended.
Online Search
Allows browser searches including Google. Customizable.
ctrl+alt+o
For example, to search on php.net,
search like php:array. Convenient for reference lookup.
GlassIt
Makes windows transparent.
alt+mouse wheel
SublimeLinter
Real-time syntax checking
Wordpress
WordPress function snippets
Language Packages
autohotkey
Install the autohotkey language package. You can change the language from the bottom right. Recommended for autohotkey users.
unity completions
Language pack for the game engine Unity.
Git-related
SublimeOnSaveBuild
Automatically builds on file save
Local History
Simple version control without using git.
Nettuts+ Fetch
You can pull external resources with simple commands. For example, jQuery that you use frequently, CSS for reset, frameworks you commonly use, CMS like WordPress, etc.
Web Coding
LiveReload
Updates browser preview simultaneously when saving files
View in Browser
Preview HTML in browser