Simon

Lemonberry Page protect is a free, open source plugin for WordPress to provide a simple method of restricting access to a group of (non-Wordpress) users. It’s intended use is for club member sites etc where you want to keep some information/forms restricted.
Multiple groups can be defined and re-used of multiple pages. The user controls allow change of password.
The administration page allows passwords to be changed, users to be added and groups to be defined.
The excerpt of a post is not blocked.
Note: This plugin will not currently work with all themes, and you’ll get a message after login to show this. We’re working on a solution to make it work with all themes which should be available soon.

Lemonberry Page Protect

Lemonberry Page Protect is a simple way to restict page/post content to a list of (non-Wordpress) users.

loloirie

Like me you need a tool to manage a league for your badminton club website and didn’t find anything to fill exactly your need… 
Maybe Aml Leagues can help you.
Feedback is welcome for this initial release, because I can’t figure all your need. 😉
This tool allows administrators to create and manage flexible leagues.
You will be able to manage clubs, players, matches… 
With customized roles, you can set other users as AML admins to help you to manage everything.
With help of few shortcodes, it’s really easy to display infos on your frontend ( league summary, table, matches…) on the frontend website.
<h4>Layout customizable</h4>
There is no option to directly edit the layout, but if you have css knowledge you can customize the layout on the frontend site.
You can edit your theme css file or better add an aml-league.css file in your theme folder.
<h3>Documentation</h3>
Will come later…

AML League

Tool to manage a badminton league (probably able to manage other sports)

Lemonberry Page Protect vs AML League