Users are able to choose on their profile edit pages (both built-in and from bbPress) whether or not they want to receive digest, at what time of the day, at which day of the week (if they receive weekly digest), and should digest include topics from all forums or only selected ones.
Administrators are able to choose on bbPress Settings page whether or not they want to enable optional weekly digest and one-click subscription.
There are hooks that enable developers to further customize this plugin.
It requires that cron runs regularly at least once an hour.
bbPress Digest is a very lightweight, it loads necessary files with functions only when needed.
If you are translator, you can translate it to your language and send translations. Currently, Serbian and Italian translations are available.
bbPress Digest is released under the terms of GNU General Public License. It is completely free so if you find it useful you can give something back to author. Your help could be done by giving donation, translating plugin to your language, sending bugs and suggestions, promoting plugin in blogs, forums social networks, and other websites.