Eric Mann

WP Publication Archive adds a custom content type for storing, tagging, and categorizing downloadable content external to standard WordPress posts and pages. You can add downloadable PDF files, Word documents, and PowerPoint presentations. These files will be stored in the standard WordPress uploads directory but will be managed separately through a custom post type interface in the WordPress admin area.
<h3>Licenses</h3>
WP Publication Archive is licensed under the GNU General Public License, version 2.
This system was based on the original wp-publications-archive plug-in published by Luis Lino and Siemens Networks, S.A. at http://code.google.com/p/wp-publications-archive/.
The filing cabinet menu icon was created by Glyphish (http://glyphish.com) and is distributed under a Creative Commons Attribution license.
Filetype icons come from the Crystal Project (http://www.everaldo.com/crystal/) released under the LGPL (http://www.everaldo.com/crystal/?action=license).

WP Publication Archive

Allows users to upload, manage, search, and download publications, documents, and similar content (PDF, Power-Point, etc.).

cloudposse

Quip integration for WordPress
<h3>Introduction</h3>
WP Quip plugin uses WordPress shortcodes to embed Quip documents into WordPress pages and blog posts.
https://codex.wordpress.org/Shortcode 
https://codex.wordpress.org/Shortcode_API
<h3>Usage</h3>
To embed the content of a Quip document into a WordPress page or blog post, use the ‘quip’ shortcode.
‘quip’ shortcode accepts two attributes and has the following format:
[quip id=”mWnnAszre3MW” ttl=7200]
where
<ul>
<li>
‘id’ (Required) – The ID of the Quip document (e.g. https://quip.com/mWnnAszre3MW)
</li>
<li>
‘ttl’ (Optional) – Time-To-Live in seconds. 
After the first request to the Quip API, the plugin caches the content of the document (HTML and images) for the specified amount of time (seconds). 
All consecutive requests to the same page or blog post will not call the Quip API again but will retrieve the document from the internal cache, making the pages faster. 
After the ‘ttl’ expires, the plugin will call the Quip API and cache the result again. 
If the ‘ttl’ attribute is not provided, the default value of 7200 seconds (2 hours) is used. 
You can change the default value in ‘Quip Settings’ (menu ‘Settings/WP Quip’). 
If ‘ttl’ is set to ‘0’, the plugin will not cache the responses, and every request to the WordPress page or blog post will call the Quip API.
</li>
</ul>
NOTE: Setting ‘ttl’ to ‘0’ also invalidates the document cache. 
This could be used if you change the Quip document and want the changes to be reflected on the website immediately. 
In this case, update the document in Quip, set ‘ttl’ to ‘0’ in the ‘quip’ shortcode, 
refresh the WordPress page or blog post in the browser to invalidate the cache, 
and then set ‘ttl’ back to its original value.

WP Publication Archive vs WP Quip