Stand_Alone_Like_SystemStandalone Like System is an excellent 3-in-one (Component, Plugin and Module) bundle extension that is very simple to implement and easy to use. This will allow you to place a custom Like or Vote button to receive vote, complements, like from both guest and logged in visitors. Saves you coding time without any tweaking of template and gives you freedom from third party social network.
Social Share/Vote Button is a popular Joomla plugin that shows social share or vote button in articles / content. It contains all popular social networks or share/bookmark sites that supports button/badge for vote/share.
CBX Twitter fanbox is a joomla module. See twitter fanbox in sidebar/moduile position