jquery.fancytree/demo/ajax-tree-fs.json

Fancytree is a JavaScript tree view plugin for jQuery with support for persistence, keyboard, checkboxes, drag'n'drop, and lazy loading.

[
	{"title": "/", "expanded": true, "folder": true, "children": [
		{"title": "dev", "folder": true},
		{"title": "etc", "folder": true, "children": [
			{"title": "cups"},
			{"title": "httpd"},
			{"title": "init.d"}
		]},
		{"title": "sbin", "folder": true},
		{"title": "tmp", "folder": true},
		{"title": "Users", "expanded": true, "folder": true, "children": [
			{"title": "jdoe", "folder": true},
			{"title": "jmiller", "folder": true},
			{"title": "mysql", "folder": true}
		]},
		{"title": "usr", "expanded": true, "folder": true, "children": [
			{"title": "bin", "folder": true},
			{"title": "lib", "folder": true},
			{"title": "local", "folder": true}
		]},
		{"title": "var", "expanded": true, "folder": true, "children": [
			{"title": "log", "folder": true},
			{"title": "spool", "folder": true},
			{"title": "yp", "folder": true}
		]}
	]}
]