ramon fincken

This plugin prevents anyone from updating the WordPress core, redirecting them to another page. Use it whisely as you should built in some mechanism to keep your clients WP core up to date!
Coding by: <a href="http://www.mijnpress.nl" rel="nofollow ugc">MijnPress.nl</a> <a href="http://twitter.com/#!/ramonfincken" rel="nofollow ugc">Twitter profile</a> <a href="https://wordpress.org/extend/plugins/profile/ramon-fincken" rel="ugc">More plugins</a>

Prevent core update

This plugin prevents anyone from updating the WordPress core, redirecting them to another page. Use it whisely as you should built in some mechanism t …

ctomczyk

Spam Prevention for WP Contact Form 7 and WordPress Comments. 
This plugin adds a small code snippet to determine page scroll and add dynamically a unique token. 
It also supports the “Contact Form 7 Database Addon – CFDB7” and prevents contact form submissions from being saved if validation fails.
If the token doesn’t exists while submitting or call directly API then the incoming request will be rejected.
You can see how it works on <a href="https://www.sitelint.com/contact" rel="nofollow ugc">SiteLint</a> website.

Spam Prevention for Contact Form 7 and Comments

Spam Prevention for WP Contact Form 7 (manage multiple contact forms) and WordPress Comments.

Prevent core update vs Spam Prevention for Contact Form 7 and Comments