My Sublime Text 2 keymap. Simple but powerful.

sublime-text-2-keymap.json

[
	// auto-indentation shortcut
	{ "keys": ["f9"], "command": "reindent"},
	// tab escape parenthesis, quotes, etc...
	{ "keys": ["tab"], "command": "move", "args": {"by": "characters", "forward": true}, "context":
	    [
	        { "key": "preceding_text", "operator": "regex_contains", "operand": "[^ \t]+", "match_all": true },
	        { "key": "following_text", "operator": "regex_contains", "operand": "^[)'}\"\\]]", "match_all": true },
	        { "key": "auto_complete_visible", "operator": "equal", "operand": false },
	        // prevent tab escape when cycling through snippet fields
	        { "key": "has_next_field", "operator": "equal", "operand": false }
	    ]   
  	},
  	// linux system keybindings overrides ctrl+space for autocompletion.  Adding this manually
  	{ "keys": ["ctrl+space"], "command": "auto_complete" },
  	{ "keys": ["ctrl+space"], "command": "replace_completion_with_auto_complete", "context":
	  	[
		  	{ "key": "last_command", "operator": "equal", "operand": "insert_best_completion" },
		  	{ "key": "auto_complete_visible", "operator": "equal", "operand": false },
		  	{ "key": "setting.tab_completion", "operator": "equal", "operand": true }
	  	]
	},
	// override f2 for bookmarks, as I'm using this to switch linux workspace
	{ "keys": ["f5"], "command": "next_bookmark" },
	// Vintage (vim) escape insert mode
	{ "keys": ["j", "j"], "command": "exit_insert_mode",
	    "context":
	    [
	        { "key": "setting.command_mode", "operand": false },
	        { "key": "setting.is_widget", "operand": false }
	    ]
	}
]