Ben Huson

Use the Site Settings plugin to create admin fields for storing short text snippets for use in your theme templates. For example, an email or phone number that is displayed via your header.php template.
It can also be used for storing data which you may need to reference such as the ID of a page or a post category which you use to feature posts on your home page.
Storing these settings in the admin is preferable to hardcoding them into your templates so they can be updated easily.
<a href="https://github.com/benhuson/site-settings/wiki" rel="nofollow ugc">Read the documentation</a> to find out how to add admin fields and sections.

Site Settings

Manage custom site settings and global content fields (extendable by plugins/themes).

Lamansky

WordPress Tweaks is a powerful yet simple plugin to help you push the boundaries of WordPress by fine-tuning its many aspects. This multi-purpose plugin specializes in simple toggle-on/off changes and dropdown selections. It adds many useful settings pertaining to comments, posts, media, the administration back-end, and much more. Some tweaks can even replace plugins that you may already have installed.
The WordPress Tweaks plugin adds a “Tweaks” page to your “Settings” menu. Each individual tweak can be enabled/disabled at will using a checkbox or dropdown. An instant search bar makes it a snap to find the tweak you’re looking for.
The tweaks are as follows:
<ul>
<li>Admin
<ul>
<li>Disable the admin bar on the front-end</li>
<li>Disable the Dashboard</li>
<li>Disable tag autocomplete</li>
<li>Disable WordPress’s admin footer text/links</li>
</ul>
</li>
<li>Comments and Pings
<ul>
<li>Disable self-pinging</li>
<li>Dofollow comment author links</li>
<li>Dofollow comment body links</li>
<li>Open external comment links in new windows</li>
</ul>
</li>
<li>Media
<ul>
<li>Default media inserter tab (options: From Computer, From URL, Gallery, Media Library)</li>
<li>JPEG Quality</li>
</ul>
</li>
<li>Multisite
<ul>
<li>Let site admins edit the “Update Services” list</li>
</ul>
</li>
<li>Posts
<ul>
<li>Disable post revisions</li>
<li>Force excerpts on archives</li>
<li>Open external post links in new windows</li>
<li>Add a “Continue reading” link to excerpts</li>
</ul>
</li>
<li>Updates
<ul>
<li>Core update auto-installation (options: disabled, minor only, major and minor)</li>
</ul>
</li>
</ul>
<a href="https://downloads.wordpress.org/plugin/wordpress-tweaks.zip" rel="nofollow ugc">Download it now</a> and begin tweaking!
Supported Languages: English, Spanish, and Polish

WordPress Tweaks

Adds many must-have options for tweaking comments, posts, media, multisite, the administration back-end, and more.

Site Settings vs WordPress Tweaks