BuddyDev

Brajesh Singh

Disable Site Delete plugin only allows network administrators to delete a blog/site on a WordPress Multisite network. It does not allow blog owners to delete their blogs.
It works by doing that in 3 steps:-
<ul>
<li>Removes the delete Site link from tools menu for non network admins</li>
<li>Breaks out of wpmu_delete_blog function to avoid deletion of blog</li>
<li>hacks around option to avoid sending the delete confirmation mail to blog owner</li>
</ul>
Need more details, please visit this post on <a href="http://buddydev.com/wordpress-multisite/introducing-disable-site-delete-plugin-for-wordpress-multisite-based-networks/" title="Introducing Disable Site Delete plugin" rel="nofollow ugc">BuddyDev</a>

Disable Site Delete

a good simple plugin that does what ist says and does not try to do too much

Works as stated

Disable Site Delete plugin completely disables the site/blog deletion by a non network administrator

ramon fincken

Auto deletes expires (prunes) posts or pages after a certain amount of time. On a per category basis (single category, or all at once). 
Handy if you want to have posts with a limited timeframe such as offers, coupons etc.. 
Posts will auto delete on a per category basis: single category OR all categories at once. 
All (custom)post types are supported. (CPT support) 
Will also trash post attachments. 
Sends notification to site admin (can be turned off). 
No cronjob needed 🙂
<ul>
<li>Coding by: <a href="https://www.mijnpress.nl" rel="nofollow ugc">MijnPress.nl</a> <a href="https://mastodon.social/@ramonfincken" rel="nofollow ugc">Mastodon profile</a> <a href="https://profiles.wordpress.org/ramon-fincken/" rel="nofollow ugc">More plugins</a></li>
<li>Idea by <a href="https://www.nostromo.nl" rel="nofollow ugc">Nostromo.nl</a></li>
</ul>
Donate <a href="https://donate.ramonfincken.com/" rel="nofollow ugc">https://donate.ramonfincken.com/</a>

Auto Prune Posts

Needs to be updated; too many errors thrown. Hopefully this will be attended to as it's a really useful plugin otherwise.

Throws errors on activation.

Auto deletes expires (prunes) posts after a certain amount of time. On a per category basis (single category, or all at once.

Disable Site Delete vs Auto Prune Posts