Meitar

WordPress Crosspost posts to your WordPress.com (or self-hosted <a href="http://jetpack.me/" rel="nofollow ugc">JetPack</a>-enabled) blog of your choice whenever you hit the “Publish” (or “Save Draft”) button. It can import your reblogs and other posts on WordPress.com. It even downloads the media attachments in your WordPress.com posts and saves them in your self-hosted WordPress Media Library.
Transform your self-hosted WordPress website into a back-end for your WordPress.com-hosted website. Create original posts on your local computer, but publish them to WordPress.com. Import your WordPress.com reblogs. <a href="https://maymay.net/blog/2014/02/17/keep-a-running-backup-of-your-tumblr-reblogs-with-tumblr-crosspostr/" rel="nofollow ugc">Always have a portable copy (a running copy) of your entire WordPress.com blog</a>.
This plugin uses <a href="http://developer.wordpress.com/docs/api/" rel="nofollow ugc">WordPress.com’s REST API</a> to keep posts in sync; when you edit your WordPress post, it updates your crossposted post. Private WordPress posts stay private on the remote site, deleting a post from WordPress that you’ve previously cross-posted deletes it from the remote site, too, and so on. Scheduling a WordPress post to be published any time in the future will add it to the remote site’s future publication schedule, too. See the <a href="https://wordpress.org/plugins/wp-crosspost/other_notes/" rel="ugc">Other Notes</a> page for a complete listing of features.
WP-Crosspost is very lightweight. It just requires you to connect to your WordPress.com account from the plugin options screen. After that, you’re ready to cross-post!
Other options and features enable tweaking additional metadata from your WordPress entry (notably categories and tags) to the remote site, switching comments and pingbacks on or off, and more.
WP-Crosspost transforms your self-hosted WordPress website into a back-end for your WordPress.com-hosted website. Create your posts locally on your own computer’s WordPress, but publish to WordPress.com’s servers. This means you’ll always have a portable copy of your entire blog, and you can stop worrying about whether your backups are up to date. Create new content locally, then move them to the server automatically, instead of the other way around!
<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="https://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=Tumblr%20Crosspostr%20WordPress%20Plugin&item_number=tumblr%2dcrosspostr&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!
This plugin is inspired by and based on <a href="https://wordpress.org/plugins/tumblr-crosspostr/" rel="ugc">Tumblr Crosspostr</a>.
Full feature list
WP-Crosspost turns your self-hosted WordPress blog into the back-end of one of your WordPress.com sites. Crossposting between self-hosted WordPress blogs is theoretically supported (but untested) if you have <a href="https://jetpack.me" rel="nofollow ugc">JetPack</a> installed and enabled on the remote self-hosted WordPress blog.
You can crosspost (push):
<ul>
<li>Posts (of <a href="https://codex.wordpress.org/Post_Types" rel="nofollow ugc">any type</a>, including <a href="https://codex.wordpress.org/Pages" rel="nofollow ugc">Pages</a> and custom post types). Pushed data includes the post’s:
<ul>
<li>date</li>
<li>title</li>
<li>status and visibility settings (including the <a href="https://codex.wordpress.org/Using_Password_Protection" rel="nofollow ugc">post password</a> if set and whether or not the post is currently in the trash)</li>
<li>format</li>
<li>tags</li>
<li>categories</li>
<li>slug</li>
<li>whether comments are on or off</li>
<li>whether <a href="https://codex.wordpress.org/Glossary#Pingback" rel="nofollow ugc">pingbacks</a> are on or off</li>
<li>whether the post is <a href="https://codex.wordpress.org/Sticky_Posts" rel="nofollow ugc">sticky</a></li>
<li>featured image,</li>
<li>content</li>
<li><a href="https://codex.wordpress.org/Excerpt" rel="nofollow ugc">excerpt</a>,</li>
<li>image attachments, along with the actual image media file itself</li>
</ul>
</li>
</ul>
Some notes on crossposting (push-posting):
<ul>
<li>If you update a post on the remote site (such as on WordPress.com), the change will not be pulled back automatically, so always prefer to use your self-hosted WordPress blog to make changes.</li>
<li>When you upload a file to your Media Library, it will not be crossposted to the remote site’s Media Library until and unless you attach it to a post and save the post.</li>
<li>The URLs of images and other media files will be automatically rewritten to reference the remote site’s copy, so always use local URLs in your posts. (Let the plugin handle media URLs itself.)</li>
</ul>
When sync’ing is enabled, you will import (pull):
<ul>
<li>Posts (of any type, including pages and custom post types), including the post’s:
<ul>
<li>date</li>
<li>title</li>
<li>content</li>
<li>excerpt</li>
<li>status and visibility settings (including the <a href="https://codex.wordpress.org/Using_Password_Protection" rel="nofollow ugc">post password</a> if set and whether or not the post is currently in the trash),</li>
<li>whether comments are on or off</li>
<li>whether <a href="https://codex.wordpress.org/Glossary#Pingback" rel="nofollow ugc">pingbacks</a> are on or off</li>
<li><a href="https://support.wordpress.com/geotagging/" rel="nofollow ugc">geolocation</a></li>
<li>featured images</li>
<li>media attachments, along with the actual media file itself</li>
</ul>
</li>
</ul>
Wondering if WP-Crosspost can do something you don’t see on this list? Ask about or search for it in the <a href="https://wordpress.org/support/plugin/wp-crosspost" rel="ugc">WP-Crosspost plugin support forum</a>! Also, I’m just one guy working on this whenever I get the time to, so I prioritize the most often requested features. If your feature isn’t high on my list, please be patient or, better yet, <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=meitarm%40gmail%2ecom&lc=US&item_name=WP%20Crosspost%20WordPress%20Plugin&item_number=wp%2dcrosspost&currency_code=USD&bn=PP%2dDonationsBF%3abtn_donateCC_LG%2egif%3aNonHosted" rel="nofollow ugc">donate to support my work on this plugin</a> so that I have more time to devote to this work. Thanks! 🙂

WordPress Crosspost

WordPress Crosspost cross-posts content from your self-hosted WordPress blogs to your WordPress.com sites. Updates are crossposted, too.

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.

WordPress Crosspost vs Diasposter