Condless

WooCommerce plugin that sets default attribute for variable products automatically if only 1 option is in-stock.
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Variable product of T-shirt with color attribute (White/Blue/Black) and size attribute (S/M/XL): 
If only Black T-shirts are in-stock: default color (Black), default size (none). 
If only Small T-shirts are in-stock: default color (none), default size (Small). 
If only White and XL T-shirts are in-stock: default color (White), default size (XL).
<h4>How It Works</h4>
<ol>
<li>Before product variations is displayed to the customer, the plugin will check each attribute, and if there is only 1 in-stock option it will be set as the default.</li>
</ol>
<h4>Features</h4>
<ul>
<li>Stock: Set option as default when it’s the only 1 in-stock.</li>
<li>Per Attribute: Set specific option as default in all products with that attribute (from the Edit Attribute screen)</li>
<li>Top: Set as default the first option of each attribute.</li>
<li>Out of stock: Disable out of stock variations.</li>
<li>Add to Cart button: In archive pages display for variable products the attribute name instead of: “Select options”.</li>
<li>Select options: In single product pages remove the select options text if default attribute is set.</li>
</ul>

Default Attributes for WooCommerce

WooCommerce plugin that sets default attribute for variable products automatically if only 1 option is in-stock.

silverks

Some plugins and themes replace the default jQuery library that comes bundled with WordPress with another version, 
typically from the Google AJAX CDN. This is generally bad practice, since many other plugins and themes rely on and 
expect that the WordPress-bundled jQuery version is being loaded.
Also, typically the alternative jQuery library being loaded is not executed in the jQuery noConflict mode, which tend 
to cause conflicts with other JavaScript frameworks, like Prototype and MooTools.
This plugin simply restores the version of jQuery being loaded to the one that comes bundled with WordPress. It only 
does this if jQuery is already in the WordPress scripts queue, and won’t do anything otherwise.

Restore jQuery

Restore the loaded jQuery library to the version bundled with WordPress.

Default Attributes for WooCommerce vs Restore jQuery