mattpass

Allows users to make Bitcoin Private payments when using your WordPress site.
Install then activate the plugin and it’ll take you to the settings page, asking you to copy your widget code from your account on the btcppay.com site into the textarea shown.
After pasting in your widget code and hitting submit, you can then use the widget in a couple of ways:
Usage within areas you control from Admin, eg post pages, can use WordPress’s ‘Shortcodes’: 
– Fixed value use: [btcp_pay_widget] 
– Attribute value use: [btcp_pay_widget amount=”987.654″]
Usage within code, eg templates, can use the PHP function: 
– Fixed value use: btcp_pay_widget(); 
– Function argument value use: btcp_pay_widget(987.654);
<h4>Guides and support</h4>
You can find further information regarding this plugin at https://docs.btcppay.com/integrations/wordpress and get support via your account on btcppay.com also.
<h4>Feedback</h4>
We welcome feedback regarding the plugin use as well as ideas to improve and enhance.
<h4>Git Development</h4>
The GitHub repo at https://github.com/BTCPrivate/btcp-widget contains widget and plugin code. As an open source solution, we welcome dev help via pull requests.

BTCP Pay

Enables users of your WordPress site to hit a button to make a Bitcoin Private payment to you.

Litpay

This plugin allows you to place on your own site anywhere – a widget that allows you to buy bitcoins safely and easily using the Bitcan platform.
The widget can be freely modified according to your needs, including overwriting the default style sheet.
The current functionalities offered by the plugin are: 
* The ability to add any number of widgets as panels in the prepared places in the template. Using the Appearance -> Widgets subpage in the admin panel. 
* The ability to add anywhere (subpage, post, etc.) shortcode creating a widget and its adjustment using parameters.
For information on using the plugin and matching it, see the FAQ section.
Functionalities planned for implementation: 
* It is easier and more pleasant to customize the appearance of widgets and create styles using the form on a special subpage. 
* Easier parameter management and the ability to save your own configurations for later use.

Bitcan Widget

The official plugin containing the widget and shortcode of the secure bitcoin purchase platform - bitcan.pl.

BTCP Pay vs Bitcan Widget