Meitar

Diasposter posts to Diaspora whenever you hit the “Publish” button. It can import Disapora comments to your original WordPress posts. It even uploads your WordPress post images as native Diaspora photos.
Transform your WordPress website into a back-end for Diaspora. Create original posts using WordPress, but publish them to Diaspora. Synchronize with your Diaspora comments. Always have a portable copy (a running backup) of all your original content, plus its Diaspora discussion thread.
Diasposter implements a simple API to keep posts in sync as much as possible; when you delete your WordPress post, your Diaspora post is removed, too. Comments on your Diaspora posts appear on your WordPress posts. Deleting a comment from your WordPress post deletes it from your Diaspora post, too. Featured images (aka “post thumbnails”) and other photos in your WordPress media library can be uploaded directly into Diaspora posts to be hosted on your pod.
Diasposter is very lightweight. It just requires you to connect to your Diaspora account from the plugin options screen. After that, you’re ready to cross-post!
<ul>
<li>Secure: Unlike many other Diaspora tools, Diasposter never writes your login cookie to disk, strictly enforces encrypted connections between your blog and your Diaspora pod, and encrypts your password inside WordPress, so your Diaspora access credentials are kept as safe as you keep your WordPress database. This is especially important on Shared Hosting plans where many other customers have access to your server’s filesystem!</li>
<li>Easy to use: Seamlessly translates WordPress formatting to beautiful Diaspora posts, with full support for post formats, <a href="https://codex.wordpress.org/Post_Thumbnails" rel="nofollow ugc">featured images</a>, post titles, automatic and manual <a href="https://codex.wordpress.org/Excerpt" rel="nofollow ugc">excerpts</a>, tags, custom post types, and more.</li>
<li>Feature-rich: Numerous additional options let you provide custom linkbacks, broadcast your Diaspora post on any social media services integrated with your pod (like Twitter, Tumblr, Facebook, and WordPress), set global preferences and per-post settings, and more.</li>
</ul>
Diasposter makes use of <a href="https://codex.wordpress.org/Post_Formats" rel="nofollow ugc">Post Formats</a> to automatically choose the most appropriate formatting for your Diaspora post. This means:
<ul>
<li>WordPress’s <code>Link</code> post format becomes a Diaspora post whose title is a link to the first link in your post.</li>
<li>WordPress’s <code>Image</code> and <code>Gallery</code> post formats become Diaspora posts wherein each <code><img></code> in your post is uploaded directly into your Diaspora post, making a beautiful slideshow on Diaspora.</li>
<li>WordPress’s <code>Standard</code>, <code>Aside</code>, and <code>Status</code> post formats are crossposted exactly as you enter them. (They are left untouched.)</li>
</ul>
Other options enable tweaking additional metadata from your WordPres entry (notably tags and geo-location data), and more. Diasposter is also <a href="https://indiewebcamp.com/" rel="nofollow ugc">IndieWeb</a>-friendly, with built-in support for the <a href="https://indiewebcamp.com/rel-syndication" rel="nofollow ugc"><code>rel-syndication</code></a> pattern.
Donations for <a href="https://profiles.wordpress.org/meitar/#content-plugins" rel="nofollow ugc">my WordPress plugins</a> make up a chunk of my income. If you continue to enjoy this plugin, please consider <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=meitarm%40gmail%2ecom&lc=US&item_name=Diasposter%20WordPress%20Plugin&item_number=diasposter&currency_code=USD&bn=PP%2dDonationsBF%3abtn_donateCC_LG%2egif%3aNonHosted" rel="nofollow ugc">making a donation</a>. 🙂 Thank you for your support!
<blockquote>
Servers no longer serve, they possess. We should call them possessors.
</blockquote>
—<a href="https://twitter.com/WardCunningham/status/289875660246220800" rel="nofollow ugc">Ward Cunningham</a>
Learn more about how you can use this plugin to own your own data in conjunction with <a href="http://maymay.net/blog/2014/03/13/bring-your-own-content-virtual-self-hosting-web-publishing/" rel="nofollow ugc">the “Bring Your Own Content” self-hosted Web publishing virtual appliance</a>. 
Maintaining this plugin is a labor of love. However, if you like it, please consider <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=meitarm%40gmail%2ecom&lc=US&item_name=Diasposter%20WordPress%20Plugin&item_number=diasposter&currency_code=USD&bn=PP%2dDonationsBF%3abtn_donateCC_LG%2egif%3aNonHosted" rel="nofollow ugc">making a donation</a> for your use of the plugin, <a href="http://www.amazon.com/gp/redirect.html?ie=UTF8&location=http%3A%2F%2Fwww.amazon.com%2Fs%3Fie%3DUTF8%26redirect%3Dtrue%26sort%3Drelevancerank%26search-type%3Dss%26index%3Dbooks%26ref%3Dntt%255Fathr%255Fdp%255Fsr%255F2%26field-author%3DMeitar%2520Moscovitz&tag=maymaydotnet-20&linkCode=ur2&camp=1789&creative=390957" rel="nofollow ugc">purchasing one of Meitar’s web development books</a> or, better yet, contributing directly to <a href="http://Cyberbusking.org/" rel="nofollow ugc">Meitar’s Cyberbusking fund</a>. (Publishing royalties ain’t exactly the lucrative income it used to be, y’know?) Your support is appreciated!
<h4>Developer reference</h4>
Diasposter provides the following hooks for plugin and theme authors:
Filters
<ul>
<li><code>diasposter_save_post_types</code> – Filter an array of custom post type names to process when Diasposter is invoked in the <code>save_post</code> WordPress action.</li>
<li><code>diasposter_meta_box_post_types</code> – Filter an array of custom post type names for which to show the Diasposter post editing meta box.</li>
<li><code>diasposter_prepared_post</code> – Filter the <code>$diaspora_body</code> string immediately before it gets crossposted to Diaspora.</li>
<li><code>diasposter_services_array</code> – Filter the array of configured service integrations. Adding values like <code>facebook</code> to this array will cause Diasposter to include <code>facebook</code> in its JSON request to the Diaspora pod in the <code>services</code> field.</li>
</ul>

Diasposter

Diasposter cross-posts your WordPress entries to Diaspora. Changes to your WordPress posts are reflected in your Diaspora posts.

Matthias Pfefferle

This is a very early state of a salmon-plugin for WordPress. There are still some bugs and problems… Please 
let me know if you found some.
<blockquote>
As updates and content flow in real time around the Web, conversations around the content are becoming increasingly fragmented into individual silos. Salmon aims to define a standard protocol for comments and annotations to swim upstream to original update sources — and spawn more commentary in a virtuous cycle. It’s open, decentralized, abuse resistant, and user centric.
</blockquote>
You can find more informations about Salmon here: http://www.salmon-protocol.org/
The plugin currently only supports receiving Salmons, but I am working on a bidirectional version.
This plugin requires the following plugins:
<ul>
<li>the <code>host-meta</code>-plugin: <a href="https://wordpress.org/plugins/host-meta/" rel="ugc">https://wordpress.org/plugins/host-meta/</a></li>
<li>the <code>webfinger</code>-plugin: <a href="https://wordpress.org/plugins/webfinger/" rel="ugc">https://wordpress.org/plugins/webfinger/</a></li>
</ul>
and I recommend to use it in combination with OStatus: <a href="https://wordpress.org/plugins/ostatus-for-wordpress/" rel="ugc">https://wordpress.org/plugins/ostatus-for-wordpress/</a>

Diasposter vs Salmon