Blackbam

Create, manage and view snapshots of any post (or custom post type) whenever you want. Like user-managed revisions with a lot of useful functionality.
Features: 
* Create snapshots of any post type including all metadata at any point manually as a secure history and backup of your posts 
* Uses the standard WordPress posts table (like revisions) 
* Uses a custom post status (and therefore works for any post type) 
* Easy snapshot management meta box 
* Create Snapshots comfortably in the publish post box 
* Choose which post types you want to enable the snapshots feature for
PHP Developer API: 
 pos_create_snapshot_from($post_id): Creates a new snapshot for a given post ID 
 pos_delete_snapshot($snap_id): Delete a snapshot by its ID 
 pos_get_latest_snapshot($post_id): Returns the ID of the latest snapshot for a given post ID 
 pos_get_plainview_url($snap_id): Get the URL to the plain snapshot view
This Plugin is sponsored by ready2order GmbH, the company which is producing Austria’s best point-of-sale system. Visit us at https://www.ready2order.com/.
NOTE: The use of a custom post status in WordPress is still in beta. The developers of this plugin are in no possible case responsible for any data loss. 
If you want to be sure nothing happens, backup your database on a regular basis. You should do it anyway.

Post Snapshots

Everything works as expected and I did not hear any compaints yet.

On our live website it has been working great since two months now

Create, manage and view snapshots of any post (or custom post type) whenever you want. Like user-managed revisions with a lot of useful functionality.

This is a plugin that brings up a little preview of a site into the widget-less sidebar. If you want to use this in a widget-enabled theme, give <a href="https://wordpress.org/extend/plugins/blogintroduction-wordpress-widget/" title="blogintroduction-wordpress-widget" rel="ugc">blogintroduction-wordpress-widget</a> a chance. The link is chosen by random out of the links in the WordPress link-manager. You can specify a single link-category or use all categories for the random-link-base.
You can also decide to show invisible/private links. This is for the case you want to show links as a preview you don’t want to show in the linkroll.
If you want and if there is a description for the link done in the link-description-field it would be shown.
A refreshing via AJAX could be enabled with a specific time (in seconds) when the next thumbnail would be loaded.
This plugin uses the <a href="http://www.websnapr.com/" title="Website Thumbnais For Your Site" rel="nofollow ugc">websnapr</a>-Service for generating the thumbnail-images. Keep their <a href="http://www.websnapr.com/terms/" title="General Terms and Conditions for Websnapr" rel="nofollow ugc">term of use</a> in mind. You should get an API-Key for free from there to use this widget and get more then 80 snapshots per hour, with key it would be about 340 per hour (250.000 a month).
Since Version 0.3.0 you could also use the image-link stored in the link-manager for containing the link to the preview-image. If no link is given the widget would use websnapr as fall back.
If you want to leave a feedback, feel free to do this on the <a href="http://blog.huebel-online.de/blogintroduction-wordpress-plugin/" title="Home of blogintroduction-wordpress-plugin - Blog of Kim Huebel" rel="nofollow ugc">plugin’s homepage</a> of the author’s blog. Though the pages are in german, comments in english are wellcome, too.

blogintroduction-wordpress-plugin

Shows a thumbnail of a blogroll/linkroll-entry by random

Post Snapshots vs blogintroduction-wordpress-plugin