Jose Manuel Sanchez

Network Site Names lets you add custom site names to be shown in the admin bar menu. Site names can be used to identify each site with a different name while using the same Blog Title in the front end. This is useful for Multilanguage or Corporative networks where many sites may need the same title.
This plugin is so small and simple that it can be installed as a <a href="https://codex.wordpress.org/Must_Use_Plugins" title="Must Use Plugins" rel="nofollow ugc">Must Use Plugin</a> without having to worry about updates. Read the Installation section for instructions.

Network Site Names

This plugin lets you add custom site names to be shown in the admin bar menu.

arkoak

Features
<pre><code>Install wordpress only once and have single copy of content in one place
Show your 'same' content on different domains / subdomains using different theme per domain.
Supports wordpress installation at domain / subdomain root or any subfolder/path.
All links to your own site are auto-converted for each domain.
Add / remove or modify themes from wp-admin page
Supports both http and https domains, need to add both http and https domain in admin page.
Supports different themes on http and https for the same domain!
</code></pre>

MultiDomain enabler

One Install, one DB, multiple domains, each with its own theme.

Network Site Names vs MultiDomain enabler