Brian

Hide Plugins is a light-weight plugin that gives a single admin user the ability to hide plugins prevent them from being activated, deactivated, or deleted by clients and other users, including administrators. By activating Hide Plugins, you will be able to see all plugins and a toggle to hide each plugin from other users on the Plugins page. Hide Plugins will always remain hidden.
Note that the dropdown on the Edit Plugins page will not be affected, since it does not have a filter to hook into. Hidden plugins will remain active, so traces of the plugin in areas other than the Plugins page (like options pages in the admin menu) will still be visible. If you also want to hide menus, we recommend using <a href="https://wordpress.org/plugins/admin-menu-editor/" rel="ugc">Admin Menu Editor</a>.

Hide Plugins

Hide installed plugins from clients and other admin users.

Silver Muru

WS Force Login Page force users who are not logged in by redirect into login page, this way it is good tool for developers to install sites which are in development process by restrict access to site and its content. Or when you want to put all site articles under password this plugin will do this! Working also with domains what includes umlaut letters like ö, ä, õ, ü
Suitable also for putting site to maintenance mode and show custom message in login view.

WS Force Login Page

I had problem with other similar plugins what didnt work in sites with domains what included umlaut letters like ö, ä, õ, ü thats why I needed this kind of plugin



Useful

Redirecting user to login page if not logged in, working also with domains what includes umlaut letters like ö, ä, õ, ü

Hide Plugins vs WS Force Login Page