Messary is a free VK messenger for Windows Phone 8.1, in native metro-style, has beautiful animations and supports multiple accounts.
Written on C# using ModernDev.InTouch library.
Its now just alpha releasem so there is no it in the Store yet.
Start initialization after login:
Loaded dialogs (screenshot blured):
Info - About:
Info - Contacts:
Chat management in headline, and forwarding:
Communty messaging support: