Extension of dijit.Tree widget with checkboxes, using ForestStoreModel. Tested with dojotoolkit 1.7.

See test.html as an example with CDN loading and AMD format.

require([
		"dojo/dom", 
		"my_ext/CheckboxTree", // "dijit/Tree", 
		"dojo/data/ItemFileWriteStore", 
		"my_ext/CheckboxForestStoreModel", // "dijit/tree/ForestStoreModel", 
		"dijit/form/Button",
		"dojo/domReady!"
		], function(dom, Tree, ItemFileWriteStore, ForestStoreModel, Button) {
		
			var treeData = {
				'identifier': 'name',
				'label' : 'description',
				'items' : [
					{ 'name' : 'node1', 'description' : 'node1', 'checked' : true },
					{ 'name' : 'node2', 'description' : 'node2', 'children' : [
						{ 'name' : 'node3', 'description' : 'node3', 'checked' : false },
						{ 'name' : 'node4', 'description' : 'node4', children : [
							{ name : 'node5', description : 'node5', checked : true },
							{ name : 'node6', description : 'node6' }
						]}
					]},
					{ 'name' : 'node7', 'description' : 'node7 description', 'checked' : true },
			]};

			var treeStore = new ItemFileWriteStore({ data : treeData });
			var treeModel = new ForestStoreModel({
					store: treeStore,
					childrenAttrs: ["children"]
				});
			var tree = new Tree({
					id : "tree",
					model : treeModel,
					showRoot : false,
					openOnClick : false,
					setCheckboxOnClick : true
				},
				'treeDiv');
			tree.startup();
			
			...
			
		});