dadyzeus

Create a widget for blueCounter. It can display total, today, yesterday counter.
blueCounterWidget은 총 방문자, 오늘 방문자, 어제 방문자를 위젯을 통해 보여주는 간단한 위젯 플러그인입니다.
blueCounterWidgetは総訪問者、今日の訪問者、昨日の訪問者をウィゼットで見せる簡単なウィゼットプラグインです。
这Plug-In就是 WordPress Counter Widget Plug-in.基本上通过核对当日IP重复 counting ，会显示昨天，今天的总访客. 该Plug-In是很简单的.不用复杂的设定.你在widget菜单里可以指定widget的font颜色， 外围颜色，背景颜色等.

blueCounterWidget

A simple plugin to create a widget for counter.

Bonny85

LB Users Counter is a plugin for WordPress. Allows you to add a widget to a sidebar, where you can view some attributes with respect to the number of users browsing the website (online, offline and online user name).
API Reference
User Class
This class contains the static methods for get info of users login
<ul>
<li>
User::getUserOff() This function get number of users offline.
</li>
<li>
User::getUserOn() This function get number of users online.
</li>
<li>
User::getNameUserOn() This function get the names of users online.
</li>
</ul>
<a href="http://www.lucabonaldo.it/lb-users-counter/" rel="nofollow ugc">Documentation in Italian</a>

LB Users Counter

Allows you to add a widget to a sidebar, where you can view some attributes with respect to the number of users browsing the website.

blueCounterWidget vs LB Users Counter