janheuninck

Adds a Twitter Follow Button widget in your sidebar.
Available in English, French and Dutch!

TF Button

Add the new Twitter Follow Button to your website to increase engagement and create a lasting connection with your audience.

antonpug

This plugin adds a customizable Better Follow Button at bottom right corner of your Jetpack-powered WordPress.org site.
The plugins integrates with the built in subscription manager of the Jetpack Plugin to collect the email of the subscriber and handle distribution of new posts via email.
NOTE: This plugin requires the Jetpack plugin to be installed & activated
For further information visit the plugin website.

Better Follow Button for Jetpack

Adds a floating subscription button (like on WordPress.com sites) to Jetpack-powered WordPress.org sites.

TF Button vs Better Follow Button for Jetpack