Tournamatch

Use this plugin to create a gaming community with your own tournaments, ladders, competitor challenges, and more. Ladder standings (or “leaderboard”) track points, wins, losses, [optionally] draws, games played, win streak, and win percent. Tournament brackets support single elimination head-to-head competitions. Tournamatch also includes match challenges, player profiles, team profiles, ladder and tournament rule pages, match lists, and a player dashboard for managing everything.
Using Tournamatch, you create ladder or tournament events and allow registered users to self-serve. Registered users can create their own teams, join other teams, accept or decline join requests, drop team members, and send email or user team invitations; users can send match challenges; users or admins report, confirm, or dispute match results; ladders and tournaments will update automatically when match results are confirmed.
This plugin includes many pages and shortcodes with user-facing components. You should expect to restyle those using the WordPress Backend -> Appearance, Customize -> Additional CSS page.
Need support or have a feature request? Please reach out to us here on the WordPress.org forums, on Twitter at <a href="https://twitter.com/Tournamatch" rel="nofollow ugc">@tournamatch</a>, on Facebook at <a href="https://www.facebook.com/tournamatch" rel="nofollow ugc">Tournamatch</a>, or visit our website at <a href="https://www.tournamatch.com" rel="nofollow ugc">www.tournamatch.com</a>.

A ladder and tournament plugin for eSports, physical sports, board games, and other online gaming leagues.

TheCzarOfAll

Displays StarCraft 2 ladder rank and other vital information as a widget.
<h3>Arbitrary section</h3>
You may provide arbitrary sections, in the same format as the ones above. This may be of use for extremely complicated 
plugins where more information needs to be conveyed that doesn’t fit into the categories of “description” or 
“installation.” Arbitrary sections will be shown below the built-in sections outlined above.
<h3>A brief Markdown Example</h3>
Ordered list:
<ol>
<li>Some feature</li>
<li>Another feature</li>
<li>Something else about the plugin</li>
</ol>
Unordered list:
<ul>
<li>something</li>
<li>something else</li>
<li>third thing</li>
</ul>
Here’s a link to <a href="https://wordpress.org/" title="Your favorite software" rel="ugc">WordPress</a> and one to <a href="http://daringfireball.net/projects/markdown/syntax" title="Markdown is what the parser uses to process much of the readme file" rel="nofollow ugc">Markdown’s Syntax Documentation</a>. 
Titles are optional, naturally.
Markdown uses email style notation for blockquotes and I’ve been told:
<blockquote>
Asterisks for emphasis. Double it up for strong.
</blockquote>
<pre><code><?php code(); // goes in backticks ?>
</code></pre>

TheCzarOfAll’s SC2 Ladder Displayer

Displays StarCraft 2 ladder rank and other vital information as a widget.

Tournamatch vs TheCzarOfAll’s SC2 Ladder Displayer