ilya_compman

Плагин позволяет добавлять кнопку «Мне нравится» из социальной сети ВКонтакте (vk.com) к каждой записи в блоге. 
Плагин имеет некоторое количество настроек, перед использованием необходимо создать приложение ВКонтакте.
This plugin adds like widget of social network VK.com to your posts.

Like in Vk.com

Добавляет к постам виджет «Мне нравится» из социальной сети ВКонтакте (vk.com).

igrp

VK Lock make is possible to restrict page\post access to authorized VKontakte group members only. 
Plugin will take care about site visitor authorization in VKontakte and checking if he\she is member of VKontakte group specified by you. 
Access to the protected page\post content will be allowed only if user is authorized and is a group member.
Restriction works for password protected pages\posts only – this means that your have to set page\post type to “password protected” and specify any password (plugin does not use this password, if you like you can access protected page with that password via conditional password access form, provided by WordPress).
Plugin works via VKontakte API (https://oauth.vk.com/authorize) therefore you need to make some proper (its very easy) settings at VK.COM side. See Installation instructions.
This plugin may not work properly with PHP versions earlier than PHP 5.2

VK Lock

Restrict page\post access to authorized VKontakte group members only.

Like in Vk.com vs VK Lock