Five free WordPress contact by call plugins. Not everyone uses Skype, using following plugins you can add a call now button, call back request form etc in your WordPress site.
Simple and effective plugin for adding a Call Now button for your WordPress site mobile visitors (only for mobile optimized websites).
Callback Request plugin creates a quick and easy method for adding a call back request form to your webpage using a shortcode.
CDYNE Call Me Widget adds a ‘Call Me’ button to your website and create a call center with menus and number forwarding.
WordPress Click2Client adds in-browser phone call functionality to any WP website. You have to configure the control and drop the tag in your theme.
FREE Call-Us button lets your web visitors call you from their browser or local access numbers in 40+ countries. Answer on Skype, GTalk or any phone.