TIEro

This plugin is now available as part of <a href="https://wordpress.org/plugins/tietools-automatic-maintenance-kit/" title="TIEtools" rel="ugc">TIEtools</a>, which also includes post expiry and duplicate post control.
An extremely simple plugin which removes accumulated error log files from your web space. It is VERY important to note that the plugin does no checking or any complex stuff: it just removes error logs. Please read the FAQ before you activate this plugin.

TIElogremover

An extremely simple plugin which removes accumulated error log files from your web space.

ramon fincken

Deletes all tags (or other taxonomies), handy tool if you want to start over with a quick clean blog. 
* Coding by <a href="https://www.mijnpress.nl" title="MijnPress.nl WordPress ontwikkeling" rel="nofollow ugc">MijnPress.nl</a> 
* Idea by ber-art.nl

Mass Delete Taxonomies

5 stars: Plugin works great and fast
-1 star: There is no confirmation screen or about screen. No options to select which tags taxonomies you want to delete. The menu is just there and once you click on it.. poof. all tags are gone. While in theory this is great, it would be nice to have some kind of confirmation to let you know that it will in fact be deleting everything.



Does what it does great, but the UI could be better

Deletes all tags (or other taxonomies), handy tool if you want to start over with a quick clean blog.

TIElogremover vs Mass Delete Taxonomies