x3mgroup

This will add site-wide tweaks to the FUNCTIONS.PHP of any wp-theme, and increases the security of a WordPress Site. 
The creation of this plugin was based on Webfactory’s Ninja Security Plugin!
There is no setup or configuration screen on the current version, but it’s easy enough to edit the plugin. Supports WP Multisite installations
These are the tweaks:
Removes WordPress 
META HEADER version info, so hackers can’t find which version of WP is running!
Replaces the login information so hackers will not know if the USERNAME or the PASSWORD was wrong!
Disables the EDITING of Themes and Plugins by NON ADMIN users!
Removes 
WLW (Windows Live Writer) link is present in the header, 
which is only needed if Winodws Live Writer needs to be used!
Please feel free to add your own tweaks. If you do, please be so kind and leave a message at support!

X3M Site-Wide Ninja Tweaks

Preetinder Singh

This plugin is a collection of various WP tweaks like controlling number of post revisions, cleaning up wp_head(), disabling block editor, emojis, trash, XML-RPC etc. Simply change the settings as per your requirements.
<h3>Plugin Options</h3>
Disable Emojis 
Stops js/css code related to emojis.
Remove Blocks CSS 
Turn it on if you don’t use blocks editor.
Remove Gutenberg Duotone CSS 
Removes the inline CSS added by WP recently.
Remove WLW Manifest Link 
Remove the link link to the Windows Live Writer manifest file.
Remove RSD Link 
Remove the link to the Really Simple Discovery service endpoint.
Remove WordPress Generator Tag 
Remove WP Generator Meta Tag
Remove Feed Links 
Remove RSS feed links.
Remove REST Link 
Remove WordPress REST API link.
Remove OEmbed Links 
Remove oEmbed discovery code.
Remove Shortlink 
Remove short links of posts.
Remove DNS Prefetch Links 
Remove DNS prefetch code.
Disable Autosave 
Disable auto saving of posts.
Show Post/Comment Actions Links 
Show comment/post actions links without hovering over the item.
Redirect to post/page on publish/update 
Get redirect to front end after you save/publish a post.
Enable Classic Editor 
Disable block editor and use classic editor instead.
Enable Classic Widgets 
Revert to old classic widgets.
Disable XML RPC 
Disable XML RPC, a security risk.
Remove URL field from comment form 
Remove URL field from comment form. May not work with some themes.
Disable author sitemap 
Disable sitemap of site authors.
Disable category sitemap 
Disable sitemap for post categories.
Set image caption on upload 
Auto set caption after image upload. File name will be used as caption.
Disable WordPress Email Verification Prompts 
Stop WordPress from confirming your current site email.
Change excerpt ellipsis to ‘…’ 
Replace […] with ‘…’ for excerpt.
Excerpt length (Number of words) 
Change length of post excerpt.
Empty Trash Time 
Change trash time or disable trash.
Number of Post Revisions 
Set number of post revisions or disable post revisions.

TGG – WP Optimizer

This plugin is a collection of various WP tweaks.

X3M Site-Wide Ninja Tweaks vs TGG – WP Optimizer