etspring

NEW: Supports built-in WordPress comments threading! [see notes 2 and 3]
Automatically synchronizes comments from Your LiveJournal blog with Your stand-alone WordPress-based blog.
All imported comments are associated with Your blog entries, crossposted to LiveJournal, and shown along with comments, written in You blog.
You can choose how often do the synchronization.
Synchronization does not slow down loading of Your pages, everything is done in background.
Note 1: This plugin has to be used together with LJXP (LiveJournal CrossPoster) plugin. Support of JournalPress and other crossposters will come in future versions (please feel free to post feature requests at the plugin homepage).
Note 2: Threading depth is limited by WordPress settings (<code>Settings - Discussion</code>).
Note 3: You should consider removing <code>Reply</code> link for imported comments, because they are not really a part of WordPress :).

LJ comments import: reloaded

Automatically synchronizes comments from Your LiveJournal blog with Your stand-alone Wordpress-based blog.

evokelektrique

Replicant
A plugin that replicates and synchronize content in your WordPress websites.
<h3>Features</h3>
<ul>
<li>Sync WordPress posts, including (Create, Update, Delete) across all trusted nodes</li>
<li>Sync WordPress pages, including (Create, Update, Delete) across all trusted nodes</li>
<li>(SOON) Sync WordPress comments</li>
<li>(SOON) Sync WordPress users</li>
<li>(SOON) Sync WooCommerce products</li>
</ul>
<blockquote>
Note that currently the depth limit of nodes could be only 1 and maybe in futrue updates we will increase the limit.
</blockquote>
<h3>Example use case</h3>
<ul>
<li>
For example if you need to create chained websites, The problem arise when you need to copy countless content in multiple websites, Replicant makes this job simple and easy for you.
</li>
<li>
You want to have a backup of your posts or pages with their metadata included, Replicant is a good choice for you.
</li>
</ul>

Replicant

A plugin that replicates and synchronize content in your WordPress websites.

LJ comments import: reloaded vs Replicant