Serkan Algur

You can set a search limit for visitors via IP addresses. The plugin automatically detects visitor IP address and counts each search action of these IP addresses. You can set a limit and block time for these IP Addresses.

Search Limiter & Blocker

Set and limit search count of visitors. Also, you can block visitor IP.

steve228uk

Limit post titles with a character limit within the WordPress dashboard. The plugin works with default post types (posts/pages) as well as any custom post types defined by plugins or themes.
Simply set the character limit in the plugin’s settings pane and check which post types you wish to limit.
The title is limited within the dashboard only and pre-existing titles may need to be updated to match the new limit.

Limit Post Titles

Just wanted to let everyone know that this plugin does not work with the block editor (default editor since WP 5.0), so don't waste your time installing it if you plan to use it with the block editor

doesn't work with block editor

Limit post titles (including pages and custom post types) within the WordPress dashboard.

Search Limiter & Blocker vs Limit Post Titles