● Sublime Textでインストール済みのパッケージ一覧を表示

Preference > Package Settings > Package Control > Settings - User

このようなファイルになります

{
    "bootstrapped": true,
    "in_process_packages":
    [
    ],
    "installed_packages":
    [
        "Alignment",
        "All Autocomplete",
        "ApacheConf",
        "AutoFileName",
        "Autoprefixer",
        "BetterFindBuffer",
        "Blade Snippets",
        "BracketHighlighter",
        "Case Conversion",
        "Colorsublime",
        "Compare Side-By-Side",
        "CSS3",
        "CSSFontFamily",
        "DotENV",
        "EditorConfig",
        "Emmet",
        "Emmet Css Snippets",
        "ExpandRegion",
        "FileDiffs",
        "FindKeyConflicts",
        "Function Name Display",
        "Git",
        "GitGutter",
        "Goto-CSS-Declaration",
        "Hjson",
        "HTML-CSS-JS Prettify",
        "InputSequence",
        "Package Control",
        "Pretty JSON",
        "Sass",
        "SerializedDataConverter",
        "ShellCommand",
        "SideBarEnhancements",
        "Smart Delete",
        "SqlBeautifier",
        "SublimeCodeIntel",
        "SublimeLinter",
        "SublimeLinter-annotations",
        "SublimeLinter-contrib-sass-lint",
        "SublimeLinter-contrib-sublime-syntax",
        "SublimeLinter-csslint",
        "SublimeLinter-html-tidy",
        "SublimeLinter-phpmd",
        "SublimeNFDToNFCPaste",
        "SublimeOnSaveBuild",
        "W3CValidators"
    ],
    "repositories":
    [
        "https://github.com/kazu1107/InputSequence.git"
    ]
}

● 一覧を元にパッケージを一気に自動インストール

・まず パッケージコントロール をインストールします。

次に
↑　の内容を

/Users/ユーザー名/Library/Application Support/Sublime Text 3/Packages/User/Package Control.sublime-settings

に上書き保存して、Sublime Text を再起動してしばらく待つと自動的にインストールが始まります。

インストールにはそこそこ時間がかかるので気長に待ちましょう。