diff --git a/nbld.sh b/nbld.sh
index 2ee7e4e08..53869018c 100755
--- a/nbld.sh
+++ b/nbld.sh
@@ -37,6 +37,14 @@ node ./tiddlywiki.js \
 	--new_rendertiddler $:/core/templates/tiddlywiki5.template.html $TW5_BUILD_OUTPUT/encrypted.html text/plain \
 	|| exit 1
 
+# Fifth, d3demo.html: wiki to demo d3 plugin
+
+node ./tiddlywiki.js \
+	./editions/d3demo \
+	--verbose \
+	--new_rendertiddler $:/core/templates/tiddlywiki5.template.html $TW5_BUILD_OUTPUT/d3demo.html text/plain \
+	|| exit 1
+
 # Run tests
 
 ./test.sh
diff --git a/plugins/tiddlywiki/d3/barwidget.js b/plugins/tiddlywiki/d3/barwidget.js
index b2aff30ef..bb24e6205 100644
--- a/plugins/tiddlywiki/d3/barwidget.js
+++ b/plugins/tiddlywiki/d3/barwidget.js
@@ -1,7 +1,7 @@
 /*\
 title: $:/plugins/tiddlywiki/d3/barwidget.js
 type: application/javascript
-module-type: widget
+module-type: new_widget
 
 A widget for displaying stacked or grouped bar charts. Derived from http://bl.ocks.org/mbostock/3943967
 
@@ -12,104 +12,94 @@ A widget for displaying stacked or grouped bar charts. Derived from http://bl.oc
 /*global $tw: false */
 "use strict";
 
-var d3 = require("$:/plugins/tiddlywiki/d3/d3.js").d3;
+var Widget = require("$:/core/modules/new_widgets/widget.js").widget,
+	d3 = require("$:/plugins/tiddlywiki/d3/d3.js").d3;
 
-var BarWidget = function(renderer) {
-	// Save state
-	this.renderer = renderer;
-	// Generate child nodes
-	this.generate();
+var BarWidget = function(parseTreeNode,options) {
+	this.initialise(parseTreeNode,options);
 };
 
-BarWidget.prototype.generate = function() {
-	// Get the parameters
-	this.data = this.renderer.getAttribute("data");
-	this.grouped = this.renderer.getAttribute("grouped","no");
-	// Set the return element
-	this.tag = "div";
-	this.attributes = {
-		"class": "tw-barwidget"
-	};
-};
+/*
+Inherit from the base widget class
+*/
+BarWidget.prototype = new Widget();
 
-BarWidget.prototype.postRenderInDom = function() {
-	this.updateChart = this.createChart();
-};
-
-BarWidget.prototype.refreshInDom = function(changedAttributes,changedTiddlers) {
-	// Reexecute the widget if the data reference attributes have changed
-	if(changedAttributes.data || changedTiddlers[this.data]) {
-		// Regenerate and rerender the widget and replace the existing DOM node
-		this.generate();
-		var oldDomNode = this.renderer.domNode,
-			newDomNode = this.renderer.renderInDom();
-		oldDomNode.parentNode.replaceChild(newDomNode,oldDomNode);
-	} else if(changedAttributes.grouped) {
-		// Update the chart if the grouping setting has changed
-		this.grouped = this.renderer.getAttribute("grouped","no");
-		if(this.updateChart) {
-			this.updateChart();
-		}
+/*
+Render this widget into the DOM
+*/
+BarWidget.prototype.render = function(parent,nextSibling) {
+	// Save the parent dom node
+	this.parentDomNode = parent;
+	// Compute our attributes
+	this.computeAttributes();
+	// Execute our logic
+	this.execute();
+	// Create the chart
+	var chart = this.createChart(parent,nextSibling);
+	this.updateChart = chart.updateChart;
+	if(this.updateChart) {
+		this.updateChart();
 	}
+	// Insert the chart into the DOM and render any children
+	parent.insertBefore(chart.domNode,nextSibling);
+	this.domNodes.push(chart.domNode);
 };
 
-
-BarWidget.prototype.createChart = function() {
-
-	var n,m,stack,layers;
-
+BarWidget.prototype.createChart = function(parent,nextSibling) {
 	// Get the data we're plotting
-	var data = this.renderer.renderTree.wiki.getTiddlerData(this.data);
+	var data = this.wiki.getTiddlerData(this.barData),
+		n,m,stack,layers;
 	if(data) {
 		n = data.layers;
 		m = data.samples;
 		layers = data.data;
-	} else {
+	} else { // Use randomly generated data if we don't have any
 		n = 4; // number of layers
 		m = 58; // number of samples per layer
 		stack = d3.layout.stack();
 		layers = stack(d3.range(n).map(function() { return bumpLayer(m, .1); }));
 	}
-
+	// Calculate the maximum data values
 	var yGroupMax = d3.max(layers, function(layer) { return d3.max(layer, function(d) { return d.y; }); }),
 		yStackMax = d3.max(layers, function(layer) { return d3.max(layer, function(d) { return d.y0 + d.y; }); });
-
+	// Calculate margins and width and height
 	var margin = {top: 40, right: 10, bottom: 20, left: 10},
 		width = 960 - margin.left - margin.right,
 		height = 500 - margin.top - margin.bottom;
-
+	// x-scale
 	var x = d3.scale.ordinal()
 		.domain(d3.range(m))
 		.rangeRoundBands([0, width], .08);
-
+	// y-scale
 	var y = d3.scale.linear()
 		.domain([0, yStackMax])
 		.range([height, 0]);
-
+	// Array of colour values
 	var color = d3.scale.linear()
 		.domain([0, n - 1])
 		.range(["#aad", "#556"]);
-
+	// x-axis
 	var xAxis = d3.svg.axis()
 		.scale(x)
 		.tickSize(0)
 		.tickPadding(6)
 		.orient("bottom");
-
-	var svg = d3.select(this.renderer.domNode).append("svg")
+	// Create SVG element
+	var svgElement = d3.select(parent).insert("svg",nextSibling)
 		.attr("viewBox", "0 0 960 500")
 		.attr("preserveAspectRatio", "xMinYMin meet")
 		.attr("width", width + margin.left + margin.right)
-		.attr("height", height + margin.top + margin.bottom)
-	  .append("g")
+		.attr("height", height + margin.top + margin.bottom);
+	// Create main group
+	var mainGroup = svgElement.append("g")
 		.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
-
-	var layer = svg.selectAll(".layer")
+	// Create the layers
+	var layer = mainGroup.selectAll(".layer")
 		.data(layers)
 	  .enter().append("g")
 		.attr("class", "layer")
 		.style("fill", function(d, i) { return color(i); });
-
+	// Create the rectangles in each layer
 	var rect = layer.selectAll("rect")
 		.data(function(d) { return d; })
 	  .enter().append("rect")
@@ -117,33 +107,31 @@ BarWidget.prototype.createChart = function() {
 		.attr("y", height)
 		.attr("width", x.rangeBand())
 		.attr("height", 0);
-
+	// Transition the rectangles to their final height
 	rect.transition()
 		.delay(function(d, i) { return i * 10; })
 		.attr("y", function(d) { return y(d.y0 + d.y); })
 		.attr("height", function(d) { return y(d.y0) - y(d.y0 + d.y); });
-
-	svg.append("g")
+	// Add to the DOM
+	mainGroup.append("g")
 		.attr("class", "x axis")
 		.attr("transform", "translate(0," + height + ")")
 		.call(xAxis);
-
-	var self = this,
-		updateChart = function() {
-	  if (self.grouped !== "no") {
-		transitionGrouped();
-	  } else {
-		transitionStacked();
-	  }
+	var self = this;
+	// Return the svg node
+	return {
+		domNode: svgElement[0][0],
+		updateChart: function() {
+			if (self.barGrouped !== "no") {
+				transitionGrouped();
+			} else {
+				transitionStacked();
+			}
+		}
 	};
-	// Update the chart according to the grouped setting
-	updateChart();
-	// Return the update function
-	return updateChart;
 
 	function transitionGrouped() {
 	  y.domain([0, yGroupMax]);
-
 	  rect.transition()
 		  .duration(500)
 		  .delay(function(d, i) { return i * 10; })
@@ -156,7 +144,6 @@ BarWidget.prototype.createChart = function() {
 
 	function transitionStacked() {
 	  y.domain([0, yStackMax]);
-
 	  rect.transition()
 		  .duration(500)
 		  .delay(function(d, i) { return i * 10; })
@@ -169,7 +156,6 @@ BarWidget.prototype.createChart = function() {
 
 	// Inspired by Lee Byron's test data generator.
 	function bumpLayer(n, o) {
-
 	  function bump(a) {
 		var x = 1 / (.1 + Math.random()),
 			y = 2 * Math.random() - .5,
@@ -179,13 +165,48 @@ BarWidget.prototype.createChart = function() {
 		  a[i] += x * Math.exp(-w * w);
 		}
 	  }
-
 	  var a = [], i;
 	  for (i = 0; i < n; ++i) a[i] = o + o * Math.random();
 	  for (i = 0; i < 5; ++i) bump(a);
 	  return a.map(function(d, i) { return {x: i, y: Math.max(0, d)}; });
 	}
+};
 
+/*
+Compute the internal state of the widget
+*/
+BarWidget.prototype.execute = function() {
+	// Get the parameters from the attributes
+	this.barData = this.getAttribute("data");
+	this.barGrouped = this.getAttribute("grouped","no");
+};
+
+/*
+Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
+*/
+BarWidget.prototype.refresh = function(changedTiddlers) {
+	var changedAttributes = this.computeAttributes();
+	if(changedAttributes.data || changedTiddlers[this.barData]) {
+		this.refreshSelf();
+		return true;
+	} else if(changedAttributes.grouped) {
+		this.execute();
+		if(this.updateChart) {
+			this.updateChart();
+		}
+		return true;
+	}
+	return false;
+};
+
+/*
+Remove any DOM nodes created by this widget or its children
+*/
+BarWidget.prototype.removeChildDomNodes = function() {
+	$tw.utils.each(this.domNodes,function(domNode) {
+		domNode.parentNode.removeChild(domNode);
+	});
+	this.domNodes = [];
 };
 
 exports.d3bar = BarWidget;
diff --git a/plugins/tiddlywiki/d3/cloudwidget.js b/plugins/tiddlywiki/d3/cloudwidget.js
index fa2160754..e2bf1d7b6 100644
--- a/plugins/tiddlywiki/d3/cloudwidget.js
+++ b/plugins/tiddlywiki/d3/cloudwidget.js
@@ -1,7 +1,7 @@
 /*\
 title: $:/plugins/tiddlywiki/d3/cloudwidget.js
 type: application/javascript
-module-type: widget
+module-type: new_widget
 
 A widget for displaying word clouds. Derived from https://github.com/jasondavies/d3-cloud
 
@@ -12,7 +12,8 @@ A widget for displaying word clouds. Derived from https://github.com/jasondavies
 /*global $tw: false */
 "use strict";
 
-var d3 = require("$:/plugins/tiddlywiki/d3/d3.js").d3;
+var Widget = require("$:/core/modules/new_widgets/widget.js").widget,
+	d3 = require("$:/plugins/tiddlywiki/d3/d3.js").d3;
 
 if($tw.browser) {
 	// Frightful hack to give the cloud plugin the global d3 variable it needs
@@ -20,98 +21,121 @@ if($tw.browser) {
 	d3.layout.cloud  = require("$:/plugins/tiddlywiki/d3/d3.layout.cloud.js").cloud;
 }
 
-var CloudWidget = function(renderer) {
-	// Save state
-	this.renderer = renderer;
-	// Generate child nodes
-	this.generate();
+var CloudWidget = function(parseTreeNode,options) {
+	this.initialise(parseTreeNode,options);
 };
 
-CloudWidget.prototype.generate = function() {
-	// Get the parameters
-	this.data = this.renderer.getAttribute("data");
-	this.spiral = this.renderer.getAttribute("spiral","archimedean");
-	// Set the return element
-	this.tag = "div";
-	this.attributes = {
-		"class": "tw-cloudwidget"
+/*
+Inherit from the base widget class
+*/
+CloudWidget.prototype = new Widget();
+
+/*
+Render this widget into the DOM
+*/
+CloudWidget.prototype.render = function(parent,nextSibling) {
+	// Save the parent dom node
+	this.parentDomNode = parent;
+	// Compute our attributes
+	this.computeAttributes();
+	// Execute our logic
+	this.execute();
+	// Create the chart
+	var chart = this.createChart(parent,nextSibling);
+	this.updateChart = chart.updateChart;
+	if(this.updateChart) {
+		this.updateChart();
+	}
+	// Insert the chart into the DOM and render any children
+	parent.insertBefore(chart.domNode,nextSibling);
+	this.domNodes.push(chart.domNode);
+};
+
+CloudWidget.prototype.createChart = function(parent,nextSibling) {
+	var self = this,
+		fill = d3.scale.category20(),
+		data = this.wiki.getTiddlerData(this.cloudData);
+	// Use dummy data if none provided
+	if(!data) {
+		data = "This word cloud does not have any data in it".split(" ").map(function(d) {
+			return {text: d, size: 10 + Math.random() * 90};
+		});
+	}
+	// Create the svg element
+	var svgElement = d3.select(parent).insert("svg",nextSibling)
+		.attr("width", 600)
+		.attr("height", 400);
+	// Create the main group
+	var mainGroup = svgElement
+		.append("g")
+		.attr("transform", "translate(300,200)");
+	// Create the layout
+	var layout = d3.layout.cloud().size([600, 400])
+		.words(data)
+		.padding(5)
+		.rotate(function() { return ~~(Math.random() * 5) * 30 - 60; })
+		.font("Impact")
+		.fontSize(function(d) { return d.size*2; })
+		.on("end", draw)
+		.start();
+	// Function to draw all the words
+	function draw(words) {
+		mainGroup.selectAll("text")
+			.data(words)
+			.enter().append("text")
+			.style("font-size", function(d) { return d.size + "px"; })
+			.style("font-family", "Impact")
+			.style("fill", function(d, i) { return fill(i); })
+			.attr("text-anchor", "middle")
+			.attr("transform", function(d) {
+				return "translate(" + [d.x, d.y] + ")rotate(" + d.rotate + ")";
+			})
+			.text(function(d) { return d.text; });
+	}
+	function updateChart() {
+		layout.spiral(self.spiral);
+	}
+	return {
+		domNode: svgElement[0][0],
+		updateChart: updateChart
 	};
 };
 
-CloudWidget.prototype.postRenderInDom = function() {
-	this.updateChart = this.createChart();
+/*
+Compute the internal state of the widget
+*/
+CloudWidget.prototype.execute = function() {
+	// Get the parameters from the attributes
+	this.cloudData = this.getAttribute("data");
+	this.cloudSpiral = this.getAttribute("spiral","archimedean");
 };
 
-CloudWidget.prototype.refreshInDom = function(changedAttributes,changedTiddlers) {
-	// Reexecute the widget if the data reference attributes have changed
-	if(changedAttributes.data || changedTiddlers[this.data]) {
-		// Regenerate and rerender the widget and replace the existing DOM node
-		this.generate();
-		var oldDomNode = this.renderer.domNode,
-			newDomNode = this.renderer.renderInDom();
-		oldDomNode.parentNode.replaceChild(newDomNode,oldDomNode);
+/*
+Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
+*/
+CloudWidget.prototype.refresh = function(changedTiddlers) {
+	var changedAttributes = this.computeAttributes();
+	if(changedAttributes.data || changedTiddlers[this.cloudData]) {
+		this.refreshSelf();
+		return true;
 	} else if(changedAttributes.spiral) {
-		// Update the chart if the spiral setting has changed
-		this.spiral = this.renderer.getAttribute("spiral","archimedean");
+		this.execute();
 		if(this.updateChart) {
 			this.updateChart();
 		}
+		return true;
 	}
+	return false;
 };
 
-CloudWidget.prototype.createChart = function() {
-
-	var self = this;
-
-	var domNode = this.renderer.domNode;
-
-	  var fill = d3.scale.category20();
-
-
-	var data = this.renderer.renderTree.wiki.getTiddlerData(this.data);
-
-	if(!data) {
-		// Use dummy data if none provided
-		data = "This word cloud does not have any data in it".split(" ").map(function(d) {
-        return {text: d, size: 10 + Math.random() * 90};
-      })
-	}
-
-  var svg = d3.select(domNode).append("svg")
-        .attr("width", 600)
-        .attr("height", 400)
-      .append("g")
-        .attr("transform", "translate(300,200)");
-
-  var layout = d3.layout.cloud().size([600, 400])
-      .words(data)
-      .padding(5)
-      .rotate(function() { return ~~(Math.random() * 5) * 30 - 60; })
-      .font("Impact")
-      .fontSize(function(d) { return d.size*2; })
-      .on("end", draw)
-      .start();
-
-  function draw(words) {
-    svg.selectAll("text")
-        .data(words)
-      .enter().append("text")
-        .style("font-size", function(d) { return d.size + "px"; })
-        .style("font-family", "Impact")
-        .style("fill", function(d, i) { return fill(i); })
-        .attr("text-anchor", "middle")
-        .attr("transform", function(d) {
-          return "translate(" + [d.x, d.y] + ")rotate(" + d.rotate + ")";
-        })
-        .text(function(d) { return d.text; });
-  }
-
-  function updateChart() {
-	layout.spiral(self.spiral);
-  }
-
-  return updateChart;
-
+/*
+Remove any DOM nodes created by this widget or its children
+*/
+CloudWidget.prototype.removeChildDomNodes = function() {
+	$tw.utils.each(this.domNodes,function(domNode) {
+		domNode.parentNode.removeChild(domNode);
+	});
+	this.domNodes = [];
 };
 
 exports.d3cloud = CloudWidget;