PluginDownload Monitor
WPChill

PluginUpdated
Download Monitor Twitter Lock is a plugin by WPChill that extends Download Monitor.
Many sites hand out files freely and get nothing back in terms of social visibility. Download Monitor Twitter Lock addresses that by placing a Twitter share between the visitor and the file. A person who wants the content tweets your message first, so each file you distribute can also spread word of your brand or project through the visitor's own profile.
You decide what gets tweeted. Write a unique message for an individual download, or set one global tweet that applies to every file, which suits different campaigns or products. The extension works with any WordPress theme and its templates can be overridden, so the lock can match your site's design. Setup needs no coding, and step-by-step documentation guides the configuration.
The code of Download Monitor Twitter Lock is licensed under the GPL, so anyone may use, change and share it. Buy GPL is a paid service: a plan or a purchase of Download Monitor Twitter Lock gives you the download and its updates. The developer's own support, licence key and online services are not included.
Version 4.1.4, released 9 July 2023. New versions appear here when the developer publishes them.
Install Buy GPL Updater on your site and paste your key from My Account. It installs new versions of Download Monitor Twitter Lock for you.