GoldBroker

<p>Live Precious Metals price widgets. Gold, Silver, Palladium and Platinum price widgets. This plugin allow you to display real time gold & silver price charts in any of your widget areas.<br />
The widgets are automatically updated every minute from Monday to Friday and are availables in 119 currencies.</p>
<h4>Features</h4>
<ul>
<li>Live Gold Price</li>
<li>Live Gold Price Chart</li>
<li>Gold Price’s Daily performance</li>
<li>Live Silver Price</li>
<li>Live Silver Price Chart</li>
<li>Silver Price’s Daily performance</li>
<li>Live Palladium Price</li>
<li>Live Palladium Price Chart</li>
<li>Palladium Price’s Daily performance</li>
<li>Live Platinum Price</li>
<li>Live Platinum Price Chart</li>
<li>Platinum Price’s Daily performance</li>
<li>Updated every minute</li>
<li>Choose between 119 currencies</li>
<li>Price per oz, gram or kilogram</li>
<li>translated in 5 languages, English, Spanish, French, German and Italian </li>
<li>Customize width and height</li>
<li>Easy to customize with CSS</li>
<li>Works in all major browsers – I9+, Opera, Safari, Firefox, Chrome</li>
</ul>
<h4>Demo</h4>
<ul>
<li>Click this link for Gold Price widgets demo https://www.goldbroker.com/widgets/gold</li>
<li>Click this link for Silver price widgets demo https://www.goldbroker.com/widgets/silver</li>
</ul>


Live Gold Price & Silver Price Charts Widgets

The plugin does exactly what it offers.

Yet, in my opinion, it is poorly implemented. The plugin merely includes iframe code from www.goldbroker.com instead of directly fetching the prices from an API and displaying it itself (without an iframe). 
(The same functionality could be achieved by copying the iframe code (with the url and the needed parameters) and pasting it into a text widget.)

Works, but bad implementation

Live Gold & Silver price chart - Updated every minute - Easy to install & to customize

Maeve Lander

<p>Use Gold Price plugin to display latest prices of Gold, Platinum, Silver and Palladium in various currencies. The prices are auto updated every 15 minutes Monday-Friday. It’s easy to use, easy to customise, and stylish. Add to any page, post or widget using shortcode <code>[gold-price]</code></p>
<h4>Key Features</h4>
<ul>
<li>Show live price for Gold, Silver, Platinum, Palladium – or any combination of those.</li>
<li>Live prices updated every 2 mins</li>
<li>Choose currency</li>
<li>Can do grams or ounces </li>
<li>Simple, light-weight, and looks good!</li>
<li>Easy to customise with CSS</li>
<li>Works in all major browsers – I9+, Opera, Safari, Firefox, Chrome</li>
</ul>
<h4>Demo</h4>
<ul>
<li><a href="http://demo.enigmaweb.com.au/gold-price/" rel="nofollow ugc">Click here</a> for out-of-the-box demo</li>
</ul>


Gold Price

Seems not to work, the prices are all 0, even in demo: http://demo.enigmaweb.com.au/gold-price/

Does not work

Simple programmatically so it is not any load on WP at all. Using rather old API for settings but that is just a sign that WP is working well in backwards compatibility, still. 

This plugin uses an xml [feed] that is hosted on a secure site, so I hope it will work for a very long time as the author has "Moved On" to other things. 

Works good

Gold Price - simple, nicely designed commodities price chart.

Live Gold Price & Silver Price Charts Widgets vs Gold Price