Add a Vk.com sharing button to the Jetpack Sharing module
The Like button requires an app ID and a Vk.com account. To use the Like button you would have to create your own app on Vk.com. I wanted this plugin to be simple to use, so I chose the Share button instead.
If this Jetpack addon becomes popular, I will propose that we add Vk.com in Jetpack's Sharing module.