Jürgen Müller

Just another mask! 
A very lightweight extension for the core/group gutenberg block. 
This adds an option, under the group blocks style tab, to add different top or bottom masks to a group block. 
You will love it. 🙂

Easy Mask

Boring straight lines? Add option to mask the core/group block with waves, slopes, spikes etc. A very lightweight extension for the core group block.

Hansdeboeck

You can use this plugin to prevent your site from appearing in the server logs of referred pages as a referrer. The operators of the referred pages cannot see where their visitors come from any more.
For example, this plugin will automatically convert all external links to this format http://cube.hacemedia.be/url/?http://example.com.
This is an anonymous link to example.com which prevents the original site from appearing as a referrer in the log files of the referred page.
Information:
Reliability Hide the referrer from linked sites ? the ?Referer? header will always be blank.
Speed No waiting pages ? no slowdown.
No Ads Links are free of advertisements.
Security All traffic is encrypted using SSL.
(Based on the WP Blank Referer by blackhatzen)

Anonymize Cube

Anonymize all your external links with the Cube service.

Easy Mask vs Anonymize Cube