TIgor4eg

This plugin takes tweets from public profile and posts to VK.com(VKontekte).
Plugin stores last 50 tweets. New tweets are checked every 10 minytes (depends on WP-Cron) and every time you visit settings page. All links appear unshorted. First link in tweet is parsed as attachement to VK Wall post. Twitter usernames will appear as a link to twitter profile.

Twi2VK

This plugin posts twitter statuses to VK.com

GrayHunter

LJ-XP-SW is a WordPress 2.5+ plugin, that has the ability to crosspost a blog text to your LiveJournal (or LiveJournal-based clone) account. It can crosspost to communities, and even has a customizeable header and footer, and allows you to direct would-be LJ comments to your WP blog instead!
But the main feature is that the plugin does not crosspost the exact text of your article. There is a special field where you can write your Alternate Annonce. So, this plugin helps your blog avoid fines for plagiarism. This is the realy Safe Way LiveJournal Crossposter.
Features:
<ul>
<li>The plugin does not crosspost the exact text of your article.</li>
<li>There is a special field where you can write your Alternate Annonce. So, this plugin helps your blog avoid fines for plagiarism. This is the realy Safe Way LiveJournal Crossposter.</li>
</ul>

LJ-XP-SW

LJ-XP-SW a plugin, that has the ability to crosspost a blog text to your LiveJournal (or LiveJournal-based clone) account in safe way.

Twi2VK vs LJ-XP-SW